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. Calcium ions bind to [1] on [2] molecules, freeing binding sites for [3] on [4] filaments

  • 1: Actin, 2: Tropomyosin, 3: Myosin heads, 4: Troponin
  • 1: Troponin, 2: Tropomyosin, 3: Myosin heads, 4: Actin
  • 1: Tropomyosin, 2: Myosin heads, 3: Actin, 4: Troponin
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2. The act of [1] binding to a receptor on [2] causes a conformational change, releasing the [3] molecule, allowing [2] to bind to [4] in the nucleus and initiate transcription.

  • 1: DNA, 2: transcriptional factor, 3: inhibitor, 4: oestrogen
  • 1: oestrogen, 2: a transcriptional factor, 3: inhibitor, 4: DNA
  • 1: a transcriptional factor, 2: DNA, 3: inhibitor, 4: oestrogen

3. [1] may bind to [2] and 'guide' it to [3] to which [1] has [4], the [2] then cuts the [3], preventing translation.

  • 1: siRNA, 2: a hydrolytic enzyme, 3: mRNA, 4: a complementary base sequence
  • 1: a hydrolytic enzyme, 2: siRNA, 3: mRNA, 4: a complementary base sequence
  • 1: mRNA, 2: a hydrolytic enzyme, 3: siRNA, 4: a complementary base sequence

4. 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

5. A deletion or insertion, unless of a multiple of X, will cause Y. What are X and Y?

  • X is 3, Y is frame shift
  • X is 2, Y is cancer
  • X is 3, Y is cancer

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