AQA GCSE · Biology 8461

Animal tissues, organs and organ systems: Practice Questions

4 multiple-choice questions marked as you go, and 5 written questions with worked solutions. All on Animal tissues, organs and organ systems.

9 questions24 marksFree, no account

Question 1

1 mark

Which enzyme is produced by the salivary glands and the pancreas to break down starch into simple sugars?

Question 2

1 mark

A patient is diagnosed with coronary heart disease. Which of the following evaluations correctly compares the use of statins and stents as treatments?

Question 3

1 mark

In the human heart, which specific chamber is responsible for pumping deoxygenated blood directly to the lungs?

Question 4

1 mark

Bile is an essential secretion for the digestion of lipids. Which of the following correctly describes where bile is produced and its functional role in the small intestine?

Question 5

2 marks

Name the organ system that contains the heart and blood vessels, and state its primary role in the body.

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Question 6

4 marks

Explain the role of bile in the human digestive system and describe how its properties increase the rate of lipid breakdown by lipase.

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Question 7

5 marks

Describe the biological mechanism of coronary heart disease and evaluate how the use of stents helps to treat this condition.

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Question 8

4 marks

The picture shows a sample of human blood as seen through a light microscope.

a) Identify the components labeled A and B.

b) Describe the specific function of component C and explain how its structure is adapted for this role.

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Question 9

5 marks

Enzymes are biological catalysts that increase the rate of chemical reactions in the body. The graph shows the effect of \( \text{pH} \) on the activity of two protease enzymes, X and Y.

a) Describe the 'lock and key' theory of enzyme action.

b) Enzyme X is found in the human stomach. Use the graph to state the optimum \( \text{pH} \) for this enzyme and explain why the activity of enzyme X decreases as the \( \text{pH} \) increases beyond this point.

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