Biochemistry MCQs
Biochemistry MCQs cover enzymes, metabolism, vitamins, nucleic acids, and clinical correlations. Perfect for MDCAT, USMLE, FCPS, and competitive exams, these quizzes strengthen molecular biology concepts and link biochemical processes to human health and disease.
Q: A zwitterion has
A) Positive charge only
B) No charge
C) Negative charge only
D) Both charges
✅ Correct Answer: D
Explanation: Zwitterions have both positive and negative charges on the same molecule.
Q: DNA replication is
A) Dispersive
B) Non-selective
C) Semi-conservative
D) Conservative
✅ Correct Answer: C
Explanation: Each new DNA molecule contains one original and one new strand.
Q: Pepsin is active in the
A) Liver
B) Stomach
C) Intestine
D) Mouth
✅ Correct Answer: B
Explanation: Pepsin functions in the stomach at acidic pH.
Q: Chylomicrons transport
A) Proteins
B) Nucleic acids
C) Lipids
D) Carbohydrates
✅ Correct Answer: C
Explanation: Chylomicrons carry dietary lipids from the intestine to the bloodstream.
Q: Liver stores excess glucose as
A) Lactose
B) ATP
C) Fructose
D) Glycogen
✅ Correct Answer: D
Explanation: The liver converts and stores excess glucose in the form of glycogen.