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Home » Biochemistry MCQ

Biochemistry MCQ

Total MCQ: 92

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1 How many reactions are involved in glycolysis?

  • A) 5
  • B) 7
  • C) 10
  • D) 12
View Answer & Discuss

2 Which reaction generates water as a byproduct during glycolysis?

  • A) Conversion of glucose to glucose-6-phosphate
  • B) Conversion of phosphoenolpyruvate to pyruvate
  • C) Conversion of dihydroxyacetone phosphate to glyceraldehyde-3-phosphate
  • D) None generate water directly
View Answer & Discuss

3 What type of phosphorylation occurs during glycolysis?

  • A) Oxidative phosphorylation
  • B) Substrate-level phosphorylation
  • C) Photophosphorylation
  • D) Chemiosmotic phosphorylation
View Answer & Discuss

4 In which cellular component does substrate-level phosphorylation occur during glycolysis?

  • A) Mitochondria
  • B) Cytoplasm
  • C) Nucleus
  • D) Endoplasmic reticulum
View Answer & Discuss

5 Which of the following statements about glycolytic intermediates is true?

  • A) They can easily diffuse out of the cell.
  • B) Most are phosphorylated metabolites.
  • C) They do not participate in other metabolic pathways.
  • D) They are all five-carbon sugars.
View Answer & Discuss

6 What regulates the flux through the irreversible steps in glycolysis?

  • A) Concentration of substrates
  • B) Activity levels of specific enzymes
  • C) Availability of oxygen
  • D) All of these factors
View Answer & Discuss

7 What happens to NAD+ during glycolysis?

  • A) It is consumed.
  • B) It is reduced to NADH.
  • C) It is oxidized.
  • D) It is converted to FADH2.
View Answer & Discuss

8 What does the term “ATP payoff phase” refer to in glycolysis?

  • A) The phase where ATP is consumed
  • B) The phase where ATP is generated
  • C) The phase where glucose is broken down
  • D) The phase where NADH is produced
View Answer & Discuss

9 Which reaction in glycolysis has a large negative ΔG and is essentially irreversible?

  • A) Reaction 1 (Hexokinase)
  • B) Reaction 5 (Triose phosphate isomerase)
  • C) Reaction 7 (Phosphoglycerate kinase)
  • D) Reaction 10 (Pyruvate kinase)
View Answer & Discuss

10 Which of the following sugars can enter glycolysis?

  • A) Sucrose
  • B) Fructose
  • C) Galactose
  • D) All of the above
View Answer & Discuss
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