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Home Biochemistry TCA Cycle Comments

  • Question
  • In what form does the product of glycolysis enter the TCA cycle?


  • Options
  • A. AcetylCoA
  • B. Pyruvate
  • C. NADH
  • D. Glucose

  • Correct Answer
  • AcetylCoA 


  • TCA Cycle problems


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    • 1. Energy that is released from glucose during respiration but not transferred to ATP bonds can be detected as

    • Options
    • A. CO2
    • B. AMP
    • C. ADP
    • D. heat
    • Discuss
    • 2. The FADH2 and NADH produced by the oxidation of one acetyl-CoA results in the synthesis of about-

    • Options
    • A. 3 ATPs
    • B. 6 ATPs
    • C. 11 ATPs
    • D. 15 ATPs
    • Discuss
    • 3. Which of the following is called milk ejection hormone?

    • Options
    • A. Prolactin
    • B. Vasopressin
    • C. Oxytocin
    • D. All of these
    • Discuss
    • 4. Cholestrol is the precursor of

    • Options
    • A. steroid hormones
    • B. vitamin A
    • C. bile salts
    • D. both (a) and (c)
    • Discuss
    • 5. How many classes of steroid hormones are there?

    • Options
    • A. 3
    • B. 2
    • C. 4
    • D. 5
    • Discuss
    • 6. To stop ATP synthesis which chemical is generally used?

    • Options
    • A. DNSA
    • B. 2,4 dinitrophenol
    • C. DDT
    • D. None of the chemical can stop ATP synthesis
    • Discuss
    • 7. A positive redox potential means substance has

    • Options
    • A. lower affinity for electron
    • B. higher affinity for electron
    • C. lower affinity for proton
    • D. higher affinity for proton
    • Discuss
    • 8. 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
    • 9. In eukaryotes, electron transport occurs in

    • Options
    • A. membranes and mitochondria
    • B. endoplasmic reticulum
    • C. cytoplasm
    • D. all of the above
    • Discuss
    • 10. 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


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