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: Translation converts mRNA into
A) DNA
B) Protein
C) Glucose
D) Lipid
✅ Correct Answer: B
Explanation: Translation is the process of synthesizing proteins from mRNA.
Q: Enzyme specificity depends on
A) pH
B) Size
C) Temperature
D) Active site shape
✅ Correct Answer: D
Explanation: The enzyme's active site must match the substrate's shape.
Q: Lactose is composed of
A) Fructose and maltose
B) Glucose and galactose
C) Glucose and fructose
D) Glucose and sucrose
✅ Correct Answer: B
Explanation: Lactose is a disaccharide of glucose and galactose.
Q: Biuret test detects
A) Nucleic acids
B) Proteins
C) Lipids
D) Carbohydrates
✅ Correct Answer: B
Explanation: The Biuret reagent turns violet in the presence of proteins.
Q: ATP primarily serves as
A) Hormone
B) Enzyme
C) Energy currency
D) Structural unit
✅ Correct Answer: C
Explanation: ATP provides energy for most biochemical cellular processes.