Cell Biology Lectures 6-10 MCQ

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1. Which enzyme is used to convert Succinyl-CoA to Succcinate in the Krebs cycle?

  • a-ketoglutarate dehydrogenase
  • Succinate thiokinase enzyme
  • Succinate isomerase
  • Succinate dehydrogenase
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2. Which of the following does NOT stimulate the PDH complex?

  • High energy state in the cell
  • High levels of Ca
  • High levels of FAD+
  • High levels of Mg

3. Which of the following is true of Leigh syndrome?

  • It is an early onset fatal disorder
  • Results in lesions in the hypothalamus and the midbrain
  • Mutations found in complex II
  • Causes by too much ATP being produced

4. What is NOT true of mitochondrial DNA?

  • Can be analysed to track movements of populations
  • Rate of mutations is higher than in nuclear DNA
  • Produce their own mitochondrial enzymes
  • Inherited from the mother

5. What is NOT true of Beri Beri?

  • Characterised by neurological and pulmonary symptoms
  • It is a vitamin B1 deficiency
  • Leads to high levels of pyruvate
  • Leads to high levels of a-keroglutamate

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