- A) Glucose-6-phosphate
- B) Fructose-1,6-bisphosphate
- C) Glyceraldehyde-3-phosphate
- D) Pyruvate
Biochemistry MCQ
Total MCQ: 92
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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
13 Which enzyme catalyzes the conversion of phosphoenolpyruvate to pyruvate?
- A) Phosphofructokinase
- B) Pyruvate kinase
- C) Aldolase
- D) Enolase
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.
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.
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
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
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
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
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.