Cell Biology Lectures 6-10 MCQ

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1. Which of the following is NOT true of Fructose-2,-6-bispohosphate?

  • Regulates pyruvate kinase
  • it is phosphorylated it slows down glycolysis
  • Regulates phosphofructokinase-1
  • Its production is catalysed by PFK-2
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2. Which of the following is NOT true of an uncoupling agent?

  • Can be used as a slimming agent
  • Acts as a weak alkali
  • Disrupts proton gradient
  • Can cause seizures

3. What is Tarui disease?

  • Defect in muscle phosphofructokinase
  • Build up of glucose in muscle causing pain and weakness
  • Deficiency in pyruvate kinase
  • Abnnormal lysing of erythrocytes

4. Which of the following is NOT true of ATP synthase?

  • It rotates as protons move through
  • Subunit ratio of F0 varies from cell to cell
  • B subunit in F1 contrins ADP substrate binding sites
  • A very large protein complex

5. How long does a molecules of 44,000d take to diffuse through the nuclear pore complex?

  • Cannot enter by diffusion
  • It is freely diffusible
  • 30 minutes
  • 2 minutes

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