Biochemistry MCQ - Page 2
Access 30+ biochemistry multiple-choice questions on this page for focused learning and exam preparation. These questions are designed to enhance conceptual understanding, boost accuracy, and provide a practical way to revise important biochemistry topics.
Q21. Which disease is due to deficiency of Vitamin C?
A. Scurvy
B. Rickets
C. Pellagra
D. Kwashiorkor
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Q22. Which part of the cell is called “powerhouse”?
A. Lysosome
B. Ribosome
C. Nucleus
D. Mitochondria
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Q24. Which lipid is essential for brain cell membranes?
A. Cholesterol
B. Lecithin
C. Triglyceride
D. Sphingomyelin
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Q25. The main nitrogenous excretory product in humans is:
A. Urea
B. Uric acid
C. Ammonia
D. Creatinine
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Q26. Which is the hereditary material?
A. RNA
B. Enzyme
C. DNA
D. Protein
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Q27. Which fat-soluble vitamin is an antioxidant?
A. Vitamin A
B. Vitamin D
C. Vitamin E
D. Vitamin K
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Q28. The “Cori Cycle” links muscle and liver via which metabolite?
A. Glucose
B. Lactate
C. Pyruvate
D. Fructose
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Q29. Which amino acid carries ammonia to the liver?
A. Lysine
B. Glutamine
C. Valine
D. Alanine
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Q30. Which hormone increases blood sugar?
A. Insulin
B. Glucagon
C. Growth hormone
D. Oxytocin
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Q31. Major energy reserve in the human body is:
A. Glycogen
B. Protein
C. Fat
D. ATP
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Q32. Hyperbilirubinemia leads to:
A. Diabetes
B. Goiter
C. Jaundice
D. Night blindness
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Q33. Enzymes mostly belong to the class of:
A. Lipids
B. Proteins
C. Carbohydrates
D. Nucleic acids
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Q34. Which element is required for thyroid hormone synthesis?
A. Iodine
B. Selenium
C. Iron
D. Magnesium
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Q35. What is the normal fasting blood glucose range (mg/dL)?
A. 50–70
B. 70–110
C. 120–140
D. 140–180
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Q36. A competitive enzyme inhibitor:
A. Binds allosteric site
B. Binds active site
C. Denatures enzyme
D. Destroys substrate
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Q37. Which of the following molecules is a disaccharide?
A. Glucose
B. Fructose
C. Maltose
D. Ribose
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Q38. Transamination requires coenzyme:
A. FAD
B. Pyridoxal phosphate
C. Coenzyme Q
D. Biotin
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Q39. Which protein protects from blood loss during injury?
A. Albumin
B. Immunoglobulin
C. Fibrinogen
D. Collagen
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Q40. The main function of hemoglobin is to transport:
A. Glucose
B. Iron
C. Oxygen
D. Nitrogen
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