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conditions."},{"text":"Insulin is a heart drug from foxgloves.","correct":false,"explanation":"Insulin is a hormone treatment for diabetes, not a heart drug obtained from foxgloves. The correct answer is digitalis, which is derived from foxglove chemicals."},{"text":"Penicillin is a heart drug from foxgloves.","correct":false,"explanation":"Penicillin is an antibiotic originally produced by Penicillium mould, not a foxglove-derived heart drug. The correct answer is digitalis."},{"text":"Aspirin is a heart drug from foxgloves.","correct":false,"explanation":"Aspirin is a painkiller based on a chemical from willow bark, whereas the foxglove-derived heart drug is digitalis."}]},{"id":"093fa720-484e-43a9-b670-7342d62220ce","cardType":"basic","points":1,"front":"Which plant-derived drug is used as a painkiller?","back":"Aspirin is a painkiller from a chemical found in willow bark.","mcqOptions":[{"text":"Aspirin is a painkiller from a chemical found in willow bark.","correct":true,"explanation":"Aspirin is a plant-derived painkiller developed from salicylic acid, a chemical found in willow bark."},{"text":"Digitalis is a painkiller from a chemical found in willow bark.","correct":false,"explanation":"Digitalis comes from foxgloves and is used as a heart drug, not a willow-derived painkiller. The correct answer is aspirin."},{"text":"Penicillin is a painkiller from a chemical found in willow bark.","correct":false,"explanation":"Penicillin is an antibiotic made by Penicillium mould, not a painkiller from willow bark. Aspirin is the willow-derived painkiller."},{"text":"Insulin is a painkiller from a chemical found in willow bark.","correct":false,"explanation":"Insulin is used to treat diabetes and is not derived from willow bark. The plant-derived painkiller in this example is aspirin."}]},{"id":"fd8a964a-6323-47a3-9572-651b2ea78b70","cardType":"basic","points":2,"front":"Who discovered penicillin, and what microorganism produced it?","back":"Penicillin was discovered by Alexander Fleming from Penicillium mould.","mcqOptions":[{"text":"Penicillin was discovered by Alexander Fleming from Penicillium mould.","correct":true,"explanation":"Alexander Fleming observed that Penicillium mould prevented nearby bacteria from growing, leading to the discovery of the antibiotic penicillin."},{"text":"Aspirin was discovered by Alexander Fleming from Penicillium mould.","correct":false,"explanation":"Fleming discovered penicillin from Penicillium mould, not aspirin. Aspirin was developed from a chemical found in willow bark and is used as a painkiller."},{"text":"Penicillin was discovered by Louis Pasteur from willow bark.","correct":false,"explanation":"The discovery was made by Alexander Fleming from Penicillium mould. Willow bark is associated with aspirin, while Pasteur was not the discoverer here."},{"text":"Digitalis was discovered by Alexander Fleming from foxgloves.","correct":false,"explanation":"Digitalis is a heart drug from foxgloves, but Fleming discovered penicillin from Penicillium mould. Confusing the two plant or microorganism sources gives the wrong answer."}]},{"id":"83d9c875-45fb-44ac-977a-cd5375e43e9d","cardType":"basic","points":1,"front":"How do antibiotics cure bacterial diseases?","back":"Antibiotics kill bacteria or stop them growing inside the body.","mcqOptions":[{"text":"Antibiotics kill bacteria or stop them growing inside the body.","correct":true,"explanation":"Antibiotics treat bacterial diseases by killing bacteria or preventing them from reproducing inside the body."},{"text":"Antibiotics kill viruses or stop them reproducing inside the body.","correct":false,"explanation":"Antibiotics target bacteria, not viruses. The correct mechanism is killing bacteria or stopping their growth inside the body."},{"text":"Antibiotics strengthen red blood cells so they destroy bacteria inside the body.","correct":false,"explanation":"Antibiotics act directly on bacteria rather than strengthening red blood cells. They cure bacterial disease by killing bacteria or stopping their growth."},{"text":"Antibiotics cool the body so bacteria cannot survive inside the body.","correct":false,"explanation":"Reducing body temperature is not how antibiotics work. They treat bacterial disease by killing bacteria or stopping them growing."}]},{"id":"1685cbd5-44d5-41c8-8e47-743b2be0d118","cardType":"basic","points":1,"front":"Why do antibiotics not cure viral diseases?","back":"Antibiotics have no effect on viruses.","mcqOptions":[{"text":"Antibiotics have no effect on viruses.","correct":true,"explanation":"Viruses reproduce inside host cells and do not have the bacterial structures targeted by antibiotics, so antibiotics cannot cure viral diseases."},{"text":"Antibiotics have a weak effect on viruses.","correct":false,"explanation":"Antibiotics do not provide a weaker version of treatment for viruses; they have no effect on them. Antibiotics work against bacteria instead."},{"text":"Antibiotics have a delayed effect on viruses.","correct":false,"explanation":"Waiting longer does not make antibiotics effective against viruses. They have no effect because viral diseases are not caused by bacteria."},{"text":"Antibiotics have a harmful effect on viruses.","correct":false,"explanation":"Antibiotics do not kill or harm viruses. The correct statement is that they have no effect on viruses, although unnecessary use can affect useful bacteria."}]},{"id":"100dea34-7060-4741-81db-c4a6b760ae38","cardType":"basic","points":2,"front":"What observation led Fleming to discover penicillin?","back":"Fleming noticed that bacteria were killed around Penicillium mould on a culture plate.","mcqOptions":[{"text":"Fleming noticed that bacteria were killed around Penicillium mould on a culture plate.","correct":true,"explanation":"A clear area without bacterial growth surrounded the Penicillium mould on Fleming’s culture plate, showing that the mould produced a substance that killed bacteria."},{"text":"Fleming noticed that bacteria grew faster around Penicillium mould on a culture plate.","correct":false,"explanation":"Bacteria were killed around the mould, rather than growing faster there. This clear area led Fleming to investigate penicillin."},{"text":"Fleming noticed that viruses were killed around Penicillium mould on a culture plate.","correct":false,"explanation":"The observation involved bacteria, not viruses. Bacteria were absent around Penicillium mould, suggesting that the mould produced an antibacterial substance."},{"text":"Fleming noticed that Penicillium mould was killed around bacteria on a culture plate.","correct":false,"explanation":"The direction of the effect is reversed: bacteria were killed around the Penicillium mould. That observation led to the discovery of penicillin."}]},{"id":"a549e695-0d3c-4360-912e-7785611e2cee","cardType":"basic","points":1,"front":"Where were drugs traditionally obtained from?","back":"Traditionally, drugs were extracted from plants and microorganisms.","mcqOptions":[{"text":"Traditionally, drugs were extracted from plants and microorganisms.","correct":true,"explanation":"Before modern synthesis became common, useful drug chemicals were commonly extracted from natural sources such as plants and microorganisms."},{"text":"Traditionally, drugs were extracted from animals and rocks.","correct":false,"explanation":"Animals and rocks are not the traditional sources identified here. The correct sources were plants and microorganisms, which can produce useful chemicals."},{"text":"Traditionally, drugs were extracted from metals and synthetic plastics.","correct":false,"explanation":"Metals and synthetic plastics are manufactured or inorganic materials, not the traditional biological sources in this topic. The answer is plants and microorganisms."},{"text":"Traditionally, drugs were extracted from viruses and fossil fuels.","correct":false,"explanation":"Viruses and fossil fuels are not the traditional sources described. Drugs were traditionally extracted from plants and microorganisms."}]},{"id":"88dfefcd-bff2-4495-b39f-567e0be85c2e","cardType":"basic","points":1,"front":"How are most new drugs produced today?","back":"Most new drugs are synthesised by chemists in the pharmaceutical industry.","mcqOptions":[{"text":"Most new drugs are synthesised by chemists in the pharmaceutical industry.","correct":true,"explanation":"Most modern drugs are made by chemical synthesis, with chemists in the pharmaceutical industry designing, producing and testing potential medicines."},{"text":"Most new drugs are synthesised by doctors in hospitals.","correct":false,"explanation":"Doctors prescribe and monitor medicines, but pharmaceutical chemists usually synthesise new drugs. Hospitals are not the main setting for drug production."},{"text":"Most new drugs are synthesised by farmers in greenhouses.","correct":false,"explanation":"Farmers may grow plants that provide starting chemicals, but most modern drugs are synthesised by chemists in the pharmaceutical industry."},{"text":"Most new drugs are synthesised by microorganisms in the bloodstream.","correct":false,"explanation":"Microorganisms can be natural sources of drug chemicals, but they do not synthesise most new drugs in the bloodstream. Pharmaceutical chemists produce them."}]},{"id":"37d91e6e-652f-430f-9c65-c4cd1f6271e2","cardType":"basic","points":1,"front":"What may provide the starting point for a synthesised drug?","back":"The starting chemical may still be extracted from a plant or microorganism.","mcqOptions":[{"text":"The starting chemical may still be extracted from a plant or microorganism.","correct":true,"explanation":"Even when the final medicine is synthesised, researchers may begin with a useful chemical originally identified and extracted from a plant or microorganism."},{"text":"The starting chemical may still be extracted from a metal or mineral.","correct":false,"explanation":"The starting point described is biological, not a metal or mineral. A useful chemical may be extracted from a plant or microorganism before synthesis."},{"text":"The starting chemical may still be extracted from a virus or red blood cell.","correct":false,"explanation":"Viruses and red blood cells are not the sources specified for these starting chemicals. The correct sources are a plant or microorganism."},{"text":"The starting chemical may still be extracted from a plastic or fuel.","correct":false,"explanation":"Plastic and fuel are not the natural biological sources used here. A synthesised drug may start with a chemical from a plant or microorganism."}]},{"id":"36542ca1-97df-41e8-b14f-9ed316ead4ba","cardType":"basic","points":2,"front":"Why must every new medicine be tested before use?","back":"New medicines are tested to check their safety and effectiveness.","mcqOptions":[{"text":"New medicines are tested to check their safety and effectiveness.","correct":true,"explanation":"Testing checks whether a medicine works as intended and whether its benefits outweigh harmful effects, establishing its effectiveness and safety before use."},{"text":"New medicines are tested to check their colour and flavour.","correct":false,"explanation":"Colour and flavour may affect acceptability, but the essential checks before use are safety and effectiveness. These show whether the medicine works without unacceptable harm."},{"text":"New medicines are tested to check their price and packaging.","correct":false,"explanation":"Price and packaging are commercial considerations, not the main scientific reasons for testing. Medicines must be checked for safety and effectiveness."},{"text":"New medicines are tested to check their speed and popularity.","correct":false,"explanation":"Popularity does not demonstrate that a medicine works, and speed alone does not establish safe use. Testing checks safety and effectiveness."}]},{"id":"909934b6-e154-4ea7-9e49-15d4b3addfd0","cardType":"basic","points":3,"front":"What three things are new drugs tested for?","back":"

Toxicity - harmful side effects
Efficacy - whether the drug works
Dose - the amount needed

","mcqOptions":[{"text":"

Toxicity - harmful side effects
Efficacy - whether the drug works
Dose - the amount needed

","correct":true,"explanation":"New drugs are tested for toxicity to identify harm, efficacy to measure whether they work, and dose to find the amount needed for treatment."},{"text":"

Solubility - how quickly it dissolves
Colour - its visible appearance
Mass - how heavy it is

","correct":false,"explanation":"These physical properties are not the three key clinical checks. Researchers need to assess toxicity, efficacy and dose to establish safe, useful treatment."},{"text":"

Temperature - its storage heat
Size - the tablet dimensions
Flavour - its taste

","correct":false,"explanation":"Storage and formulation may matter later, but the essential drug tests concern toxicity, efficacy and dose, including harmful effects, effectiveness and amount required."},{"text":"

Growth - how large it becomes
Colour - its visible appearance
Age - how long it lasts

","correct":false,"explanation":"Drugs are not assessed using growth, colour and age as the three main tests. The correct checks are toxicity, efficacy and dose."}]},{"id":"a01b59fc-81ee-45c2-9a8c-d89020533314","cardType":"basic","points":2,"front":"What can happen during the development of a new medicine?","back":"Developing a new medicine can take over a decade, and most possible drugs fail before reaching patients.","mcqOptions":[{"text":"Developing a new medicine can take over a decade, and most possible drugs fail before reaching patients.","correct":true,"explanation":"Drug development is lengthy, often taking more than ten years, and many candidate drugs are rejected because they are ineffective, unsafe or unsuitable."},{"text":"Developing a new medicine can take several months, and most possible drugs reach patients.","correct":false,"explanation":"Development usually takes over a decade, not several months, and most candidate drugs fail before reaching patients. The short timeline and success rate are reversed."},{"text":"Developing a new medicine can take about one year, and all possible drugs reach patients.","correct":false,"explanation":"New medicines require many years of testing, and candidates commonly fail. Neither a one-year timeline nor universal success matches the development process."},{"text":"Developing a new medicine can take over a century, and most possible drugs fail before reaching patients.","correct":false,"explanation":"Many candidates fail, but development typically takes over a decade rather than more than a century. The correct timescale is over ten years."}]},{"id":"b55de51c-7c0f-4804-980e-cdaa124d0846","cardType":"basic","points":2,"front":"What happens during preclinical testing?","back":"Preclinical testing is laboratory testing on cells, tissues and then live animals before people receive the drug.","mcqOptions":[{"text":"Preclinical testing is laboratory testing on cells, tissues and then live animals before people receive the drug.","correct":true,"explanation":"Preclinical work begins with laboratory tests on cells and tissues, then uses live animals to gather evidence before the medicine is tested in humans."},{"text":"Preclinical testing is laboratory testing on people, tissues and then plants before animals receive the drug.","correct":false,"explanation":"Preclinical testing occurs before human trials and uses cells, tissues and then live animals. People are not the first stage of this testing."},{"text":"Preclinical testing is laboratory testing on viruses, bacteria and then people before animals receive the drug.","correct":false,"explanation":"The usual sequence is cells, tissues and then live animals before people. Testing bacteria and viruses does not replace the required preclinical stages."},{"text":"Preclinical testing is laboratory testing on cells, people and then live animals before plants receive the drug.","correct":false,"explanation":"Human testing follows preclinical work, rather than coming between cells and animals. The correct sequence ends with live animals before people receive the drug."}]},{"id":"3ded82f5-0b3d-41a7-88ce-523c67f6daf7","cardType":"basic","points":2,"front":"Why are promising drugs tested on live animals?","back":"Live animals are used to show how a promising drug behaves in a whole organism.","mcqOptions":[{"text":"Live animals are used to show how a promising drug behaves in a whole organism.","correct":true,"explanation":"Tests on cells and tissues cannot show all interactions within a body, so live animals help reveal how the drug behaves in a complete organism."},{"text":"Live animals are used to show how a promising drug behaves in a single cell.","correct":false,"explanation":"Single-cell effects can be studied without using a whole animal. Live animals are used to investigate the drug’s behaviour across a whole organism."},{"text":"Live animals are used to show how a promising drug behaves in a culture plate.","correct":false,"explanation":"Culture plates are used for laboratory tests on cells or microorganisms. Live animals provide information about behaviour in a whole organism."},{"text":"Live animals are used to show how a promising drug behaves in a chemical solution.","correct":false,"explanation":"A chemical solution cannot reproduce the interacting systems of a body. Live animals are used to study the drug in a whole organism."}]},{"id":"ddec39af-cd46-4545-a3e0-70e568f6920a","cardType":"basic","points":2,"front":"What information does preclinical testing provide?","back":"Preclinical testing provides early information about efficacy, toxicity and dose.","mcqOptions":[{"text":"Preclinical testing provides early information about efficacy, toxicity and dose.","correct":true,"explanation":"Preclinical testing gives early evidence about whether a drug works, whether it causes harmful effects and what amount may be needed."},{"text":"Preclinical testing provides early information about colour, flavour and packaging.","correct":false,"explanation":"These are formulation or marketing features, not the key biological information from preclinical testing. It investigates efficacy, toxicity and dose."},{"text":"Preclinical testing provides early information about price, popularity and advertising.","correct":false,"explanation":"Commercial success cannot be established through preclinical biological tests. These tests provide early information about efficacy, toxicity and dose."},{"text":"Preclinical testing provides early information about age, height and weight.","correct":false,"explanation":"Age, height and weight are not the three drug properties being assessed. Preclinical testing examines efficacy, toxicity and dose."}]},{"id":"092823f3-a8e0-4414-959b-6a3a9e27695d","cardType":"basic","points":1,"front":"What must happen before a drug can enter clinical trials?","back":"Only drugs that pass preclinical testing can be tested on people.","mcqOptions":[{"text":"Only drugs that pass preclinical testing can be tested on people.","correct":true,"explanation":"A drug must first provide sufficiently safe and promising evidence from laboratory and animal testing before it can proceed to clinical trials involving people."},{"text":"Only drugs that pass preclinical testing can be tested on plants.","correct":false,"explanation":"Plant testing is not the next stage referred to here. Drugs that pass preclinical testing may proceed to clinical trials involving people."},{"text":"Only drugs that pass preclinical testing can be tested on microorganisms.","correct":false,"explanation":"Microorganisms may be used in earlier laboratory research, but the required next stage is testing the drug on people in clinical trials."},{"text":"Only drugs that pass preclinical testing can be tested on packaging materials.","correct":false,"explanation":"Packaging tests do not constitute clinical trials. Passing preclinical testing allows a promising drug to be tested on people."}]},{"id":"0784a48a-1b3d-4b63-b4df-79fbdca16bab","cardType":"basic","points":2,"front":"Why are healthy volunteers given a drug before patients?","back":"Healthy volunteers receive very low doses first to check that the drug is safe.","mcqOptions":[{"text":"Healthy volunteers receive very low doses first to check that the drug is safe.","correct":true,"explanation":"Starting with healthy volunteers at very low doses allows researchers to identify harmful effects while minimising risk before exposing patients to the drug."},{"text":"Healthy volunteers receive very low doses first to check that the drug is effective.","correct":false,"explanation":"Effectiveness is primarily tested later in patients with the relevant condition. Healthy volunteers receive very low doses first to establish whether the drug is safe."},{"text":"Healthy volunteers receive very low doses first to check that the drug is addictive.","correct":false,"explanation":"Dependence may be investigated for relevant drugs, but it is not the main purpose of this stage. Very low doses are given first to check general safety."},{"text":"Healthy volunteers receive very low doses first to check that the drug is inexpensive.","correct":false,"explanation":"Manufacturing cost is not assessed by administering a drug to volunteers. Healthy volunteers receive very low doses first so researchers can check that the drug is safe."}]},{"id":"9abc587a-49a7-4067-ad87-000cae0d420c","cardType":"basic","points":2,"front":"Why is the dose slowly increased during clinical trials?","back":"The dose is gradually increased to check for side effects.","mcqOptions":[{"text":"The dose is gradually increased to check for side effects.","correct":true,"explanation":"Increasing the dose gradually allows researchers to monitor volunteers for unwanted effects while limiting their exposure if harmful side effects appear."},{"text":"The dose is gradually increased to check for infectious agents.","correct":false,"explanation":"Contamination is checked during drug manufacture rather than by raising the dose in volunteers. Gradual increases allow researchers to identify dose-related side effects safely."},{"text":"The dose is gradually increased to check for placebo effects.","correct":false,"explanation":"A placebo-controlled comparison tests the placebo effect; increasing the actual drug dose does not. The dose is raised gradually to monitor possible side effects."},{"text":"The dose is gradually increased to check for peer approval.","correct":false,"explanation":"Peer review occurs when scientists evaluate the completed research before publication. During trials, doses are increased gradually so side effects can be detected without unnecessary risk."}]},{"id":"215b6ad4-045d-4f96-93a5-f5fb63f812f0","cardType":"basic","points":2,"front":"What is tested when patients receive the drug?","back":"Patients receive the drug to check that it works and to find the optimum dose.","mcqOptions":[{"text":"Patients receive the drug to check that it works and to find the optimum dose.","correct":true,"explanation":"Patients have the condition that the drug is intended to treat, so researchers can assess its effectiveness and determine the dose giving the best balance of benefit and risk."},{"text":"Patients receive the drug to check that it is sterile and to find the optimum dose.","correct":false,"explanation":"Sterility is established through laboratory quality controls, not by administering the drug to patients. Patient trials test whether the treatment works and establish its optimum dose."},{"text":"Patients receive the drug to check that it is natural and to find the optimum dose.","correct":false,"explanation":"Whether a substance is natural does not determine its clinical usefulness or safety. Patients receive the drug to test whether it works and to establish the optimum dose."},{"text":"Patients receive the drug to check that it is patented and to find the optimum dose.","correct":false,"explanation":"Patent status is a legal matter and cannot be tested by giving a drug to patients. Patient trials assess whether the drug works and determine the optimum dose."}]},{"id":"92a7b99a-b19a-4bc9-b2df-f9a203b012b4","cardType":"basic","points":3,"front":"How does a placebo-controlled trial test whether a drug has an effect?","back":"

Patients are assigned to groups at random.
One group receives the drug and another receives a placebo.
The outcomes are compared to identify the drug's effect.

","mcqOptions":[{"text":"

Patients are assigned to groups at random.
One group receives the drug and another receives a placebo.
The outcomes are compared to identify the drug's effect.

","correct":true,"explanation":"Random allocation reduces systematic differences between groups, while the placebo provides a control. Comparing their outcomes isolates changes caused by the active drug."},{"text":"

Patients are assigned to groups by age.
One group receives the drug and another receives a placebo.
The outcomes are compared to identify the drug's effect.

","correct":false,"explanation":"Allocating patients by age could create groups that differ systematically and introduce bias. Patients should be assigned at random before drug and placebo outcomes are compared."},{"text":"

Patients are assigned to groups at random.
One group receives the drug and another receives a lower dose.
The outcomes are compared to identify the drug's effect.

","correct":false,"explanation":"A lower dose still contains active drug, so it is not a placebo control. One group must receive an inactive placebo to reveal the drug's effect."},{"text":"

Patients are assigned to groups at random.
One group receives the drug and another receives a placebo.
The doses are combined to identify the drug's effect.

","correct":false,"explanation":"Combining doses would destroy the separate control and treatment groups. Researchers compare the outcomes of randomly assigned drug and placebo groups to identify the drug's effect."}]},{"id":"128cd36d-b67f-445f-ad15-3a4a1f83b105","cardType":"basic","points":1,"front":"What happens in a double-blind trial?","back":"Neither the patient nor the doctor knows who receives the real drug or placebo.","mcqOptions":[{"text":"Neither the patient nor the doctor knows who receives the real drug or placebo.","correct":true,"explanation":"Keeping both patients and doctors unaware of treatment allocation prevents their expectations from influencing reported symptoms, treatment decisions or recorded trial outcomes."},{"text":"Only the patient, not the doctor knows who receives the real drug or placebo.","correct":false,"explanation":"If the patient knows the allocation, expectations could alter reported symptoms and produce bias. In a double-blind trial, neither patients nor doctors know the allocations."},{"text":"Only the doctor, not the patient knows who receives the real drug or placebo.","correct":false,"explanation":"This describes a single-blind arrangement because the doctor knows the allocation and could record results differently. Double-blind trials keep both doctors and patients unaware."},{"text":"Both the patient and the doctor know who receives the real drug or placebo.","correct":false,"explanation":"If both know the allocation, expectations can influence responses and observations. A double-blind trial prevents this by keeping both the patient and doctor unaware."}]},{"id":"658f56b8-7065-4254-bfcd-d2c18b464663","cardType":"basic","points":2,"front":"Why are double-blind trials used?","back":"Double-blind trials remove bias because expectations cannot influence recorded results.","mcqOptions":[{"text":"Double-blind trials remove bias because expectations cannot influence recorded results.","correct":true,"explanation":"When neither patients nor doctors know the treatment allocation, their expectations are less able to affect symptom reporting, observations or the recording of results."},{"text":"Double-blind trials remove placebos because expectations cannot influence recorded results.","correct":false,"explanation":"Double-blind trials commonly retain a placebo group; they conceal which treatment each participant receives. This reduces bias caused by patient and doctor expectations."},{"text":"Double-blind trials remove variables because expectations cannot influence recorded results.","correct":false,"explanation":"Trials still contain variables such as treatment and measured outcome. Double-blinding specifically reduces bias by preventing knowledge and expectations from influencing recorded results."},{"text":"Double-blind trials remove side effects because expectations cannot influence recorded results.","correct":false,"explanation":"Blinding cannot prevent pharmacological side effects, although it can reduce biased reporting. Its purpose is to remove bias caused by patients' and doctors' expectations."}]},{"id":"5484eba7-02b8-482c-9219-57dad8c96d9e","cardType":"basic","points":1,"front":"What is peer review?","back":"Peer review is when other scientists check results before publication.","mcqOptions":[{"text":"Peer review is when other scientists check results before publication.","correct":true,"explanation":"Peer review allows independent specialists to examine the methods, analysis and conclusions, helping journals identify weaknesses or unsupported claims before publishing the research."},{"text":"Clinical testing is when other scientists check results before publication.","correct":false,"explanation":"Clinical testing involves administering a drug to volunteers or patients, not independent scientists checking a report. Checks by other scientists before publication are called peer review."},{"text":"Random sampling is when other scientists check results before publication.","correct":false,"explanation":"Random sampling is a method for selecting participants and does not evaluate a completed scientific report. Evaluation by other scientists before publication is peer review."},{"text":"Placebo testing is when other scientists check results before publication.","correct":false,"explanation":"Placebo testing compares an active treatment with an inactive substitute during a trial. When other scientists assess results before publication, the process is peer review."}]},{"id":"43f6810b-ea7c-4c70-953f-705b07f9bfbb","cardType":"basic","points":2,"front":"How does peer review improve published drug-trial results?","back":"Peer review helps check that results are accurate and prevents false claims.","mcqOptions":[{"text":"Peer review helps check that results are accurate and prevents false claims.","correct":true,"explanation":"Independent scientists examine the methods, data and conclusions, making errors or unsupported interpretations more likely to be identified before publication."},{"text":"Peer review helps check that results are profitable and prevents false claims.","correct":false,"explanation":"Peer reviewers assess scientific quality rather than commercial profitability. Their examination of methods, data and conclusions helps check accuracy and prevent unsupported claims."},{"text":"Peer review helps check that results are popular and prevents false claims.","correct":false,"explanation":"Popularity is not a measure of scientific validity. Peer review checks whether methods and conclusions are accurate, helping to stop false or unsupported claims from being published."},{"text":"Peer review helps check that results are positive and prevents false claims.","correct":false,"explanation":"Valid trials may produce positive, negative or inconclusive results. Peer review checks their accuracy and whether conclusions are supported, rather than requiring a positive outcome."}]},{"id":"5e5728cc-e72b-4fa7-bd53-e265e8bd392d","cardType":"cloze","points":null,"front":"The first stage of testing a new drug, using cells, tissues and animals before people, is called [ ].","back":"The first stage of testing a new drug, using cells, tissues and animals before people, is called preclinical testing.","mcqOptions":[{"text":"preclinical testing","correct":true,"explanation":"Preclinical testing takes place before human clinical trials and uses cells, tissues and animals to investigate toxicity, efficacy and potentially suitable doses."},{"text":"clinical testing","correct":false,"explanation":"Clinical testing involves healthy volunteers and patients, so it is the human stage. Testing on cells, tissues and animals before human trials is preclinical testing."},{"text":"placebo testing","correct":false,"explanation":"Placebo testing compares an active drug with an inactive treatment during clinical trials. The earlier testing using cells, tissues and animals is called preclinical testing."},{"text":"double-blind testing","correct":false,"explanation":"Double-blind testing conceals treatment allocation from patients and doctors during a clinical trial. The stage involving cells, tissues and animals is preclinical testing."}]},{"id":"da2b460f-4fa4-4c4b-8d2b-f578b15c5e5e","cardType":"cloze","points":null,"front":"In clinical trials, healthy volunteers receive the drug at [ ] first.","back":"In clinical trials, healthy volunteers receive the drug at very low doses first.","mcqOptions":[{"text":"very low doses","correct":true,"explanation":"Very low doses minimise potential harm when a drug is first given to humans, allowing researchers to monitor its safety before gradually increasing the amount."},{"text":"very high doses","correct":false,"explanation":"Beginning with a high dose would expose healthy volunteers to unnecessary risk before the drug's human effects are known. Clinical trials therefore start with very low doses."},{"text":"the optimum dose","correct":false,"explanation":"The optimum dose cannot be known at the start of clinical trials; it is established through later testing. Healthy volunteers initially receive very low doses for safety."},{"text":"the maximum dose","correct":false,"explanation":"Starting at the maximum dose would increase the risk of severe side effects in healthy volunteers. Researchers begin with very low doses and increase them cautiously."}]},{"id":"465bd6ca-dafc-4762-ab7b-fae152c8e664","cardType":"cloze","points":null,"front":"The dose given to patients is adjusted to find the [ ].","back":"The dose given to patients is adjusted to find the optimum dose.","mcqOptions":[{"text":"optimum dose","correct":true,"explanation":"The optimum dose provides the greatest useful therapeutic effect while keeping side effects and risks at an acceptably low level."},{"text":"starting dose","correct":false,"explanation":"A starting dose is the initial amount administered, not the final amount selected after adjustment. Varying the dose helps researchers identify the optimum dose."},{"text":"placebo dose","correct":false,"explanation":"A true placebo contains no active drug, so adjusting active-drug amounts cannot establish a placebo dose. Researchers adjust doses to find the optimum dose."},{"text":"maximum dose","correct":false,"explanation":"The largest tolerated amount is not necessarily the most effective or safest choice. Dose adjustment aims to find the optimum dose, balancing benefit against side effects."}]},{"id":"3b0803c2-3e93-4403-88b9-59ff70a6d2ac","cardType":"cloze","points":null,"front":"A dummy treatment containing no active drug is called a [ ].","back":"A dummy treatment containing no active drug is called a placebo.","mcqOptions":[{"text":"placebo","correct":true,"explanation":"A placebo resembles the tested treatment but contains no active drug, providing a control against which researchers can compare the drug group's outcomes."},{"text":"vaccine","correct":false,"explanation":"A vaccine contains active components intended to stimulate an immune response, so it is not a dummy treatment. An inactive treatment used as a control is a placebo."},{"text":"antibiotic","correct":false,"explanation":"An antibiotic contains an active substance that kills bacteria or inhibits their growth. A dummy treatment containing no active drug is called a placebo."},{"text":"painkiller","correct":false,"explanation":"A painkiller contains an active ingredient intended to reduce pain, so it is not an inactive control. A dummy treatment is called a placebo."}]},{"id":"c7342136-886a-4099-b220-0fec4651606c","cardType":"cloze","points":null,"front":"Patients are assigned to placebo or drug groups [ ].","back":"Patients are assigned to placebo or drug groups at random.","mcqOptions":[{"text":"at random","correct":true,"explanation":"Random assignment reduces selection bias and makes systematic differences between drug and placebo groups less likely, supporting a fair comparison of their outcomes."},{"text":"by age","correct":false,"explanation":"Assigning groups by age could make age affect the comparison, creating a confounding difference. Patients should be allocated at random to reduce selection bias."},{"text":"by symptoms","correct":false,"explanation":"Allocating patients according to symptoms could give one group more severe illness and distort the outcome. Random assignment makes the groups more comparable."},{"text":"by preference","correct":false,"explanation":"Allowing personal preference to determine allocation can produce groups with systematically different expectations or characteristics. Patients should instead be assigned to groups at random."}]},{"id":"be63edfa-47b4-4722-a85f-03ba9b8d02b5","cardType":"cloze","points":null,"front":"Before results are published, they are checked by other scientists through [ ].","back":"Before results are published, they are checked by other scientists through peer review.","mcqOptions":[{"text":"peer review","correct":true,"explanation":"During peer review, independent scientists assess the methods, evidence and conclusions, helping identify errors and unsupported claims before results enter the scientific literature."},{"text":"clinical testing","correct":false,"explanation":"Clinical testing evaluates a drug in human volunteers and patients rather than checking a report for publication. Assessment by other scientists is called peer review."},{"text":"random allocation","correct":false,"explanation":"Random allocation assigns participants to trial groups and occurs before treatments are compared. Scientists checking completed research before publication perform peer review."},{"text":"placebo control","correct":false,"explanation":"A placebo control allows outcomes from an active drug to be compared with an inactive treatment. External checking of results before publication is peer review."}]}]}],"examCountdown":{"examDate":"2027-05-11","paperLabel":"Paper 1"},"heading":"3.1.9 Discovery and development of drugs","title":"3.1.9 Discovery and development of drugs Flashcards","topbar":{"backHref":"/gcse/biology/aqa/flashcards"},"topicSidebar":"$L36"}]}],"topicId":"1d122e75-9a7b-5211-9c2d-ccb8640e023f","walled":"$L37"}],"$L38","$L39"]