Biochemistry MCQs
Biochemistry MCQs play a vital role in preparing students for understanding life at the molecular level. These MCQs include topics such as carbohydrate metabolism, lipid and protein structures, enzymes, vitamins, DNA/RNA, and clinical applications. These quizzes are essential for students appearing in MDCAT, USMLE, FCPS, and other competitive exams. Regular practice enhances understanding of how biochemical processes affect human health and disease.
Q: Enzyme responsible for DNA replication
A) Helicase
B) RNA polymerase
C) DNA polymerase
D) Ligase
✅ Correct Answer: C
Explanation: DNA polymerase adds nucleotides to the growing DNA strand.
Q: Organ responsible for most plasma protein synthesis
A) Spleen
B) Liver
C) Kidney
D) Lung
✅ Correct Answer: B
Explanation: The liver produces the majority of plasma proteins including albumin.
Q: Protein that transports iron in the blood
A) Albumin
B) Transferrin
C) Hemoglobin
D) Ferritin
✅ Correct Answer: B
Explanation: Transferrin binds iron and transports it through the bloodstream.
Q: Metabolic pathway activated during fasting
A) Lipogenesis
B) Glycogenesis
C) Glycolysis
D) Gluconeogenesis
✅ Correct Answer: D
Explanation: Gluconeogenesis generates glucose from non-carbohydrate sources during fasting.
Q: Primary storage form of lipids in adipose tissue
A) Fatty acids
B) Triglycerides
C) Cholesterol
D) Phospholipids
✅ Correct Answer: B
Explanation: Triglycerides are the main energy storage lipids in adipocytes.
Q: Protein structure level involving multiple subunits
A) Secondary
B) Primary
C) Tertiary
D) Quaternary
✅ Correct Answer: D
Explanation: Quaternary structure refers to the assembly of multiple polypeptide chains.