Category: GATE Biotechnology Previous Year Papers with Solutions

20. Which one of the following amino acids has the highest probability to be found on the surface of a typical globular protein in aqueous environment? (A) Ala (B) Val […]

19. A single subunit enzyme converts 420 μmoles of substrate to product in one minute. The activity of the enzyme is __________ × 10−6 Katal.   The enzyme activity is […]

18. Which one of the following organisms is used for the determination of phenol coefficient of a disinfectant? (A) Salmonella typhi (B) Escherichia coli (C) Candida albicans (D) Bacillus psychrophilus […]

17. ABO blood group antigens in humans are differentiated from each other on the basis of (A) sialic acid (B) lipids (C) spectrin (D) glycoproteins ABO blood group antigens in […]

16. Anergy refers to (A) mitochondrial dysfunction (B) allergy to environmental antigens (C) unresponsiveness to antigens (D) a state of no energy Correct Answer: (C) unresponsiveness to antigens Anergy describes […]

15. The cytokinetic organelle in plant cells is (A) centriole (B) phragmoplast (C) proplastid (D) chromoplast The cytokinetic organelle in plant cells is the phragmoplast. This structure facilitates cytokinesis by guiding […]

14. Based on the heavy chain, which one of the following antibodies has multiple subtypes? (A) IgM (B) IgD (C) IgE (D) IgG IgG is the antibody with multiple subtypes […]

13. Which one of the following is a second generation genetically engineered crop? (A) Bt brinjal (B) Roundup soybean (C) Golden rice (D) Bt rice Golden Rice is a second-generation […]

12. Levinthal’s paradox is related to (A) protein secretion (B) protein degradation (C) protein folding (D) protein trafficking Levinthal’s Paradox in Protein Folding: MCQ Solved Levinthal’s paradox addresses the puzzle […]

11. Which one of the following complement proteins is the initiator of the membrane attack complex? (A) C3a (B) C3b (C) C5a (D) C5b C5b initiates the membrane attack complex […]