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: Triglycerides are composed of
A) Fatty acids and glycerol
B) Proteins and lipids
C) Glycerol and glucose
D) Fatty acids and nucleotides
✅ Correct Answer: A
Explanation: Triglycerides are formed from glycerol and three fatty acids.
Q: RNA contains the sugar
A) Ribose
B) Glucose
C) Fructose
D) Deoxyribose
✅ Correct Answer: A
Explanation: Ribose is the sugar present in RNA molecules.
Q: Peptide bonds are found in
A) Nucleic acids
B) Proteins
C) Lipids
D) Carbohydrates
✅ Correct Answer: B
Explanation: Peptide bonds link amino acids to form proteins.
Q: The central dogma of molecular biology is
A) DNA → Protein → RNA
B) RNA → DNA → Protein
C) DNA → RNA → Protein
D) Protein → DNA → RNA
✅ Correct Answer: C
Explanation: Genetic information flows from DNA to RNA to protein.
Q: Urea cycle occurs mainly in the
A) Liver
B) Kidney
C) Pancreas
D) Brain
✅ Correct Answer: A
Explanation: The liver converts toxic ammonia into urea in the urea cycle.