AQA GCSE Biology Organisation – GraspIT Answers

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AQA GCSE Biology Organisation – GraspIT Answers

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This answer sheet for the GraspIT Organisation worksheet supports students studying **GCSE **Biology under the **AQA curriculum. It provides clear and accurate answers to questions covering key topics such as cells, tissues, organs, organ systems, digestion, enzymes, and the human circulatory system. The resource is useful for checking responses, improving understanding, and supporting effective revision for GCSE Biology assessments and exams.

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1007047517-AQA-Biology-Organisation-GraspIT-GCSE-ANSWERS
1007047517-AQA-Biology-Organisation-GraspIT-GCSE-ANSWERS.pdf
: Questions and Answers 3/7/2026

GraspIT – AQA GCSE Organisation Questions

A. Principles of organisation
1. Describe the levels of organisation in the human circulatory system in size order from the smallest part.

(4)

 Muscle Cell – can contract and respiration occurs here
 Muscle (cardiac) tissue – Group of muscle cells working together to contract and respire
(cardiac muscle does not fatigue)
 Heart (organ) – muscle, valves and blood vessels, puts blood under pressure
 Circulatory system – Heart, blood and blood vessels working together to pump blood around
the body.
B. Animal tissues, organs and organ systems Part 1
1. Explain why enzymes are needed in digestion. (4)

 Biological catalysts
 Breakdown large insoluble molecules (in food)
 Into small soluble molecules
 That can be absorbed into the blood
2. Explain how the release of bile into the small intestines increases the rate of fat breakdown. (3)

 Neutralise acid
 Maintain optimum pH
 For lipase enzyme
 Emulsifies fats to reduce surface area

© Copyright The PiXL Club Ltd, 2017

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1007047517-AQA-Biology-Organisation-GraspIT-GCSE-ANSWERS.pdf 3/7/2026, 7:45:28 PM

, 1007047517-AQA-Biology-Organisation-GraspIT-GCSE-ANSWERS
1007047517-AQA-Biology-Organisation-GraspIT-GCSE-ANSWERS.pdf
: Questions and Answers 3/7/2026

GraspIT – AQA GCSE Organisation Questions

3. Different enzymes work best at different temperatures.

The graph shows the effect of temperature on different enzymes.

a. Describe and explain the shape of the graph for enzyme A. (4)

Description:
 Rate is (initially) slow
 Rate increases as temperature increases up to 40oC
 Rate declines to return to 0
 Use of data
Explanation:
 Low (kinetic) energy initially
 Fewer/lower energy collisions
 Optimum rate reached when there is the maximum number of (successful) collisions and all
active sites are being used
 Rate falls due to enzymes denaturing

b. Enzyme B is protease and is produced in the stomach, pancreas and small intestine.

Explain why protease works more effectively in the stomach. (3)

 Stomach contains acid
 Acid is low pH (pH2)
 pH provides optimum conditions for protease enzyme

© Copyright The PiXL Club Ltd, 2017

1007047517-AQA-Biology-Organisation-GraspIT-GCSE-ANSWERS.pdf
1007047517-AQA-Biology-Organisation-GraspIT-GCSE-ANSWERS.pdf 3/7/2026, 7:45:28 PM

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Study: GCSE
School year: 1
Uploaded on: March 9, 2026
Number of pages: 6
Written in: 2025/2026
Type: Exam (elaborations)
Contains: Questions & answers

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