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: pH measures the
A) Enzyme activity
B) Hydrogen ion concentration
C) Volume
D) Pressure
✅ Correct Answer: B
Explanation: pH indicates the acidity or basicity of a solution.
Q: Hydrolysis involves
A) Water removal
B) Water addition
C) Carbon fixation
D) Oxygen release
✅ Correct Answer: B
Explanation: Hydrolysis breaks bonds by adding water molecules.
Q: The sugar in RNA is
A) Sucrose
B) Deoxyribose
C) Ribose
D) Glucose
✅ Correct Answer: C
Explanation: RNA contains ribose as its sugar component.
Q: Fatty acids are long chains of
A) Hydrocarbons
B) Amino acids
C) Nucleotides
D) Sugars
✅ Correct Answer: A
Explanation: Fatty acids are composed of hydrocarbon chains with a carboxyl group.
Q: Insulin regulates the level of
A) DNA
B) Glucose
C) Oxygen
D) ATP
✅ Correct Answer: B
Explanation: Insulin lowers blood glucose by facilitating its uptake into cells.