AQA Biology A2 Unit 5 Quiz

A quiz testing most (maybe more to come) areas of the unit 5 specification.

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  • Created by: Josh
  • Created on: 03-05-13 18:07

1. During striated muscular contraction:

  • The sarcomere lengthens, the H zone remains the same size, the A and I bands both shorten
  • The sarcomere, I band and H zone become narrower, the A band maintains its width
  • The sarcomere and H zone become narrower, the A and I bands maintain their
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Other questions in this quiz

2. What does it mean to suffer from 'Type I' diabetes mellitus?

  • Type I diabetics do not produce sufficient insulin, suspected to be due to an autoimmune response to pancreatic cells and must inject insulin to maintain their BGC.
  • Type I diabetics have cells which are unresponsive to insulin (often due to obesity), and so must manage their carbohydrate intake to maintain their BGC

3. The chemo- and pressure receptors responsible for keeping the heart rate in check are found where?

  • In the aortic arch
  • In the carotid arteries
  • In the brain stem

4. If a [1] mutates it may become a [2] which stimulates [3], leading to uncontrolled cell division, or a [4]

  • 1: proto-oncogene, 2: oncogene, 3: cell division, 4: tumour
  • 1: tumor suppressor gene, 2: oncogene, 3: cell division, 4: tumour
  • 1: oncogene, 2: excitatory oncogene, 3: autolysis, 4: tumour

5. Consider the following reaction pathway: A -> D -> 4C -> 2B -> X. Which of the following would cause the system to display negative feedback?

  • X decomposes into a sixth species, E
  • X inhibits one or more of the enzymes involved in the pathway
  • X promotes one or more of the enzymes involved in the pathway

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