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Home Biochemistry TCA Cycle Comments

  • Question
  • Citric acid cycle occurs in


  • Options
  • A. cytoplasm
  • B. mitochondria
  • C. endoplasmic reticulum
  • D. golgi bodies

  • Correct Answer
  • mitochondria 


  • TCA Cycle problems


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    • 1. Standard redox potential for a substance is measured under standard condition and is expressed as

    • Options
    • A. mili-Ampere
    • B. Volt
    • C. without unit
    • D. Ohm
    • Discuss
    • 2. Oxidation of a molecule involves

    • Options
    • A. gain of electron
    • B. loss of electron
    • C. gain of proton
    • D. loss of proton
    • Discuss
    • 3. Which of the following is involved in energy production?

    • Options
    • A. Generation of proton gradients across membranes
    • B. Transport of electrons on organic molecules
    • C. Conversion of compounds with high energy to those of low energy
    • D. All of the above
    • Discuss
    • 4. In eukaryotes, electron transport occurs in

    • Options
    • A. membranes and mitochondria
    • B. endoplasmic reticulum
    • C. cytoplasm
    • D. all of the above
    • Discuss
    • 5. The catabolism of sugars and fatty acids is similar because

    • Options
    • A. both of these compounds are funnelled through the TC A/citric acid cycle
    • B. both of these compounds generate redox energy during catabolism
    • C. both of these compounds generate chemical energy during catabolism
    • D. all of the above
    • Discuss
    • 6. Which one of the following is not the intermediate of Kreb's cycle?

    • Options
    • A. Isocitrate
    • B. Succinate
    • C. Fumarate
    • D. Stearate
    • Discuss
    • 7. How many molecules of ATPs are synthesized per NADH oxidation?

    • Options
    • A. 2
    • B. 1
    • C. 3
    • D. 4
    • Discuss
    • 8. Most multi-cellular organisms obtain energy for the synthesis of ATP during oxidative phosphorylation from

    • Options
    • A. high energy phosphate compounds
    • B. a proton gradient across the inner mitochondrial membrane
    • C. a proton gradient across the cell membrane
    • D. a proton gradient across the outer mitochondrial membrane
    • Discuss
    • 9. During cellular respiration, most of the ATP made, is generated by

    • Options
    • A. oxidative phosphorylation
    • B. photophosphorylation
    • C. glycolysis
    • D. substrate-level phosphorylation
    • Discuss
    • 10. Important function of cholesterol is to

    • Options
    • A. modulate fluidity
    • B. enhance blood circulation
    • C. prevent bile salts formation
    • D. None of these
    • Discuss


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