r potassium iodide reagent) to the sample B1\n- A color change from orange-brown (or yellow-brown) to blue-black confirms starch is present B1","marks":2,"order":0,"markingRubric":null,"explanation":{"methods":[{"id":"iodine_test","label":"Iodine test for starch","steps":[{"type":"text","order":0,"title":"Choose the starch test","content":"To test specifically for starch, use **iodine solution** (also called potassium iodide reagent). Put a small sample of the mash mixture in a suitable container, then add the iodine solution. This practical step earns **B1**.","highlights":[{"text":"Starch is still present in the mash mixture.","location":"specification"}]},{"type":"text","order":1,"title":"Identify a positive result","content":"Iodine solution begins **orange-brown** (or yellow-brown). If starch is present, it changes to **blue-black**. State both the colour change and the conclusion: **orange-brown to blue-black confirms that starch is still present in the mash mixture**. This earns **B1**.","highlights":[{"text":"Starch is still present in the mash mixture.","location":"specification"}]}]}],"generatedAt":"2026-07-21T04:02:31.863Z","modelVersion":"gpt-5.6-terra","explanationVersion":"v3"},"options":[]},{"id":"46707d2d-14b1-4f6d-a48d-4e7492e22d6d","label":"b","content":"Maltose (a reducing sugar) has been produced. Include any key procedural steps.","markscheme":"- Add Benedict's reagent/solution to the sample B1\n- Heat the mixture in a water bath (or boil) at a temperature of at least $65^\\circ\\text{C}$ M1\n- A color change from blue to green, yellow, orange, or brick-red indicates maltose/reducing sugar A1","marks":3,"order":1,"markingRubric":null,"explanation":{"methods":[{"id":"benedicts_test","label":"Benedict's test","steps":[{"type":"text","order":0,"title":"Add Benedict's reagent","content":"Take a sample from the mash and add **Benedict’s reagent** (also called Benedict’s solution). This reagent tests for **reducing sugars**, including maltose.\n\nThis is the first marking point: naming and adding Benedict’s reagent earns **B1**.","highlights":[{"text":"Maltose (a reducing sugar) has been produced.","location":"specification"}]},{"type":"text","order":1,"title":"Heat the mixture","content":"Heat the sample and Benedict’s reagent together in a water bath at **at least $65^\\circ\\text{C}$** (or boil the mixture). Heating allows the test reaction to take place.\n\nStating the heating step and a temperature of at least $65^\\circ\\text{C}$ earns **M1**.","highlights":[{"text":"Include any key procedural steps.","location":"specification"}]},{"type":"text","order":2,"title":"Interpret the colour","content":"Start with blue Benedict’s reagent. After heating, a change from **blue** to **green, yellow, orange, or brick-red** shows that a reducing sugar is present. Therefore, maltose has been produced during hydrolysis.\n\nGive both the colour change and the conclusion about maltose to earn **A1**.","highlights":[{"text":"Maltose (a reducing sugar) has been produced.","location":"specification"}]}]}],"generatedAt":"2026-07-21T04:03:34.921Z","modelVersion":"gpt-5.6-terra","explanationVersion":"v3"},"options":[]}],"options":[],"explanation":null,"firstAttemptFullMarks":null},{"id":"9fed134f-a914-4013-901e-489019e82d65","revisionId":"bf4dc3d1-23ca-4b75-b2e6-a70d53ae40c9","questionNumber":null,"questionType":"LA","specification":"","difficulty":3,"difficultyBand":"easy","totalMarks":2,"sourceTitle":null,"calculatorUse":null,"parts":[{"id":"54db2e8f-9223-408b-af9d-1d6f46158100","label":null,"content":"An individual's risk of developing Type 2 diabetes (a non-communicable disease) is strongly influenced by lifestyle factors, which are often monitored using indicators of body composition. The graph below shows how Type 2 diabetes risk is categorized based on an adult's height and body mass.\n\n![Type 2 Diabetes Risk Category Graph](https://assets.mathsgenie.co.uk/aqa-qb/0ec117aa-a700-4d89-86ae-42d5ae3945ef.png)\n\nAn adult has a height of

2.2 Animal tissues, organs and organ systems

Question 8

2.2 Animal tissues, organs and organ systems Questions

2.2 Animal tissues, organs and organ systems

Question 8

2.2 Animal tissues, organs and organ systems Questions