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: Primary structure of a protein refers to
A) Folding
B) Hydrogen bonding
C) Sequence of amino acids
D) Subunit interaction
Q: Final electron acceptor in the electron transport chain
A) Oxygen
B) Water
C) Carbon dioxide
D) ATP
Q: Major buffer system in human blood
A) Bicarbonate buffer
B) Protein buffer
C) Ammonia buffer
D) Phosphate buffer
Q: Type of bond joining amino acids
A) Disulfide bond
B) Hydrogen bond
C) Ionic bond
D) Peptide bond
Q: Enzyme catalyzing DNA synthesis
A) DNA polymerase
B) RNA polymerase
C) DNA helicase
D) Ligase
Q: Basic unit of nucleic acids
A) Nucleotide
B) Amino acid
C) Sugar-phosphate
D) Nucleoside
Q: Metal ion required for hemoglobin function
A) Copper
B) Magnesium
C) Iron
D) Zinc
Q: Amino acid with a sulfur-containing side chain
A) Alanine
B) Serine
C) Cysteine
D) Glycine
Q: Primary organ for detoxification of drugs
A) Pancreas
B) Liver
C) Spleen
D) Kidney
Q: Substrate for the enzyme lactase
A) Sucrose
B) Glucose
C) Lactose
D) Galactose