AQA Biology A2 Unit 5 Quiz

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

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

1. A point mutation occurs. It may be either silent, nonsense or mis-sense. How many of the three will affect the primary structure of the resulting polypeptide?

  • 0
  • 3
  • 2
  • 1
1 of 20

Other questions in this quiz

2. In myelinated neurons, depolarisation can only occur where?

  • Dendrites
  • Nodes of ranvier
  • Nodes of his

3. Which of the factors affecting nervous impulse velocity has the most significant effect?

  • Temperature
  • Myelination
  • Axon diameter

4. Describe the role of ATP in the sliding filament theory.

  • ATP binds to myosin head, releasing it from actin, then it is hydrolysed to ADP, 'recocking' the head.
  • ATP binds to the myosin head, altering the myosin tail's angle, pulling the actin along
  • ATP binds to troponin molecules on the actin, releasing the myosin head

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


No comments have yet been made

Similar Biology resources:

See all Biology resources »See all resources »