Oxidative Phosphorylation And Photophosphorylation(Biochemistry ) Questions and Answers

Question 1. Why is the TCA cycle the central pathway of metabolism of the cell?
  1.    It occurs in the center of the cell
  2.    Its intermediates are commonly used by other metabolic reactions
  3.    All other metabolic pathways depend upon it
  4.    None of the above
Explanation:-
Answer: Option B. -> Its intermediates are commonly used by other metabolic reactions
Answer: (b).Its intermediates are commonly used by other metabolic reactions
Question 2. How many molecules of ATPs are synthesized per NADH oxidation?
  1.    2
  2.    1
  3.    3
  4.    4
Explanation:-
Answer: Option C. -> 3
Answer: (c).3
Question 3. In what form does the product of glycolysis enter the TCA cycle?
  1.    AcetylCoA
  2.    Pyruvate
  3.    NADH
  4.    Glucose
Explanation:-
Answer: Option A. -> AcetylCoA
Answer: (a).AcetylCoA
Question 4. Malate-asparatate shuttle operates in
  1.    lungs and liver
  2.    heart and liver
  3.    pancreas and liver
  4.    none of these
Explanation:-
Answer: Option B. -> heart and liver
Answer: (b).heart and liver
Question 5. Oxidation of a molecule involves
  1.    gain of electron
  2.    loss of electron
  3.    gain of proton
  4.    loss of proton
Explanation:-
Answer: Option B. -> loss of electron
Answer: (b).loss of electron
Question 6. Energy that is released from glucose during respiration but not transferred to ATP bonds can be detected as
  1.    CO₂
  2.    AMP
  3.    ADP
  4.    heat
Explanation:-
Answer: Option D. -> heat
Answer: (d).heat
Question 7. Cholesterol can be synthesized de novo in
  1.    pancreas
  2.    intestine
  3.    liver
  4.    cell membrane
Explanation:-
Answer: Option C. -> liver
Answer: (c).liver
Question 8. The first intermediate in TCA cycle is
  1.    succinate
  2.    fumerate
  3.    citrate
  4.    malate
Explanation:-
Answer: Option C. -> citrate
Answer: (c).citrate
Question 9. Which of the following is involved in energy production?
  1.    Generation of proton gradients across membranes
  2.    Transport of electrons on organic molecules
  3.    Conversion of compounds with high energy to those of low energy
  4.    All of the above
Explanation:-
Answer: Option D. -> All of the above
Answer: (d).All of the above
Question 10. Which of the following enzyme does not take part in the TCA cycle?
  1.    Citrate synthase
  2.    Iso-citrate dehydrogenase
  3.    Pyruvate dehydrogenase
  4.    Malate dehydrogenase
Explanation:-
Answer: Option C. -> Pyruvate dehydrogenase
Answer: (c).Pyruvate dehydrogenase
© Lakshya_Education.com, All Right Reserved.
Contact Us services