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Home » Biochemistry MCQ

Biochemistry MCQ

Total MCQ: 92

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11 What does fructose-6-phosphate convert into during glycolysis?

  • A) Glucose-6-phosphate
  • B) Fructose-1,6-bisphosphate
  • C) Glyceraldehyde-3-phosphate
  • D) Pyruvate
View Answer & Discuss

12 What is the overall reaction of glycolysis?

  • A) Glucose + 2 NAD+ + 2 ADP + 2 Pi → 2 Pyruvate + 2 NADH + 2 H+ + 2 ATP + 2 H2O
  • B) Glucose + O2 → CO2 + H2O + ATP
  • C) Pyruvate + NADH → Lactate + NAD+
  • D) Glucose + ATP → Glucose-6-phosphate + ADP
View Answer & Discuss

13 Which enzyme catalyzes the conversion of phosphoenolpyruvate to pyruvate?

  • A) Phosphofructokinase
  • B) Pyruvate kinase
  • C) Aldolase
  • D) Enolase
View Answer & Discuss

14 What happens to pyruvate when oxygen is present?

  • A) It is converted to lactate.
  • B) It enters the TCA cycle.
  • C) It is converted to ethanol.
  • D) It remains in the cytoplasm.
View Answer & Discuss

15 What role does glyceraldehyde-3-phosphate play in glycolysis?

  • A) It is a product that exits the pathway.
  • B) It serves as an energy carrier.
  • C) It acts as a substrate for further reactions.
  • D) It inhibits hexokinase activity.
View Answer & Discuss

16 Which of the following enzymes catalyzes a key regulatory step in glycolysis?

  • A) Hexokinase
  • B) Phosphofructokinase-1
  • C) Pyruvate kinase
  • D) All of the above
View Answer & Discuss

17 Which compound can enter anabolic pathways from glycolytic intermediates?

  • A) Glucose only
  • B) Pyruvate only
  • C) Both glucose and pyruvate
  • D) None of these
View Answer & Discuss

18 Which glycolytic intermediate can be converted into glycerol for lipid synthesis?

  • A) Fructose-6-phosphate
  • B) Glyceraldehyde-3-phosphate
  • C) Dihydroxyacetone phosphate
  • D) Pyruvate
View Answer & Discuss

19 The conversion of which molecule leads to the production of lactate in anaerobic conditions?

  • A) Glyceraldehyde-3-phosphate
  • B) Fructose-1,6-bisphosphate
  • C) Pyruvate
  • D) Acetyl-CoA
View Answer & Discuss

20 What is the role of NAD+ in glycolysis?

  • A) It acts as an electron donor.
  • B) It gets reduced to NADH.
  • C) It generates ATP directly.
  • D) It phosphorylates glucose.
View Answer & Discuss
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