What happens in cells (and what do cells need)?

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Question 20
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a.

A hibernating mammal, such as a hazel dormouse, prepares for winter by consuming a diet rich in plant material and seeds.

Complete each sentence about this process.

Use the words from the list:

  • amino acids
  • enzymes
  • fatty acids
  • glucose
  • glycogen
  • hormones
  • respiration
  • synthesis

Complex carbohydrates in the plant matter are broken down during digestion to a simple monosaccharide called _______.

Before winter, excess sugar is converted and stored in the liver and muscle tissues as the polysaccharide _______.

Proteins from the seeds are broken down into their individual monomers called _______.

These monomers are assembled within cells to produce functional biological molecules such as _______.

Throughout hibernation, cells slowly break down stored sugars to yield chemical energy (ATP) through _______.

[5]
b.

Three wildlife conservationists are debating the practice of leaving high-sugar, high-carbohydrate feed mixes out for wild garden birds during cold winter months.

  • Scientist P: "Providing energy-dense feed is highly beneficial because it helps small birds maintain their core body temperature during sub-zero winter nights."
  • Scientist Q: "Regular consumption of artificial, sugar-rich feed can cause metabolic dysfunction and high blood sugar levels, which is particularly harmful to species prone to avian diabetes."
  • Scientist R: "Using artificial feed ensures birds survive harsh winter freezes when natural forage is scarce, but over-reliance on these sugar-rich feeds can promote the transmission of diseases at feeding stations and lead to nutritional deficiencies."

Which scientist is discussing both the benefits and the risks of providing high-carbohydrate feed to wild birds? Explain your answer.

[2]
c.

A biology student is explaining how to test a seed extract to see if it contains both reducing sugars (such as glucose) and lipids.

The student says: "You cannot use the same chemical test or reagent to detect both of these molecules in the extract."

Explain why this student is correct.

[3]

What happens in cells (and what do cells need)? Questions

  1. GCSE
  2. /Biology
  3. /What happens in cells (and what do cells need)?