Master GCSE Biology

Questions:

Q1. Knowledge Recall (2 marks):

(i) What is the name of a chemical messenger that travels through the bloodstream? (1)

(ii) Define the term "negative feedback." (1)

Q2. Knowledge Recall (2 marks):

What is the role of receptors in homeostasis? (2)

Q3. Application (2 marks):

Explain how plants use auxins to regulate growth. (2)

Q4. Application (3 marks):

How does thyroxine affect metabolism in the body? Describe two specific effects. (3)

Q5. Extended Response (3 marks):

Describe the structure of a synapse and explain how it allows neurones to communicate. (3)

Q6. Application (3 marks):

How does ADH help the body regulate water balance? Explain two ways. (3)

Q7. Knowledge Recall (2 marks):

What is the target organ for the hormone insulin? (1)

What is the effect of insulin on blood glucose levels? (1)

Q8. Application (2 marks):

Explain how adrenaline can help the body prepare for a "fight or flight" response. (2)

Q9. Extended Response (4 marks):

Describe the components of a reflex arc and explain how it helps to protect the body from harm. (4)

Q10. Knowledge Recall (2 marks):

Name two hormones that are produced by the endocrine system. (1)

What is the function of the endocrine system? (1)

Mark Schemes: