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Q.41 Which of the following peptides do/does NOT absorb ultraviolet light above250 𝑛𝑚 wavelength?(A) MQRTVWG(B) YDEIGVL(C) PLASNGK(D) GSQTKRL *Peptides lacking aromatic amino acids do not absorb ultraviolet light above 250 […]

Q.40 Peptide–binding cleft in MHC–I is formed by(A) 𝛼1 and 𝛼2 domains.(B) 𝛼1 and 𝛼3 domains.(C) 𝛼1 domain and 𝛽2–microglobulin.(D) 𝛼2 domain and 𝛽2–microglobulin. The peptide-binding cleft in MHC class […]

Q.39 Phospholipid vesicles prepared in 50 𝑚𝑀 KCl were diluted in water. Based onthis information, statements P and Q are made.P: The diluted vesicles will develop membrane potential.Q: There is […]

Q.38 Fӧrster Resonance Energy Transfer does NOT depend on the(A) relative orientation of donor and acceptor.(B) fluorescence quantum yield of acceptor.(C) distance between donor and acceptor.(D) overlap between donor’s emission […]

Q.37 For an enzyme that follows Michaelis–Menten kinetics, a competitive inhibitor(A) increases both 𝐾𝑚 and 𝑉𝑚𝑎𝑥.(B) decreases both 𝐾𝑚 and 𝑉𝑚𝑎𝑥.(C) increases 𝐾𝑚 but does not affect 𝑉𝑚𝑎𝑥.(D) decreases 𝐾𝑚 […]

Q.36 Which one of the following molecules does NOT contain phosphoanhydridebond(s)?(A) Adenosine diphosphate(B) Adenosine triphosphate(C) Fructose–1,6–bisphosphate(D) Pyrophosphate Fructose-1,6-bisphosphate does not contain phosphoanhydride bonds. This molecule from glycolysis features phosphoester linkages instead, […]

Q.35 Which of the following statements about antibodies is/are correct?(A) Different antibody classes have different effector functions.(B) Each antibody chain consists of an amino–terminal constant region and a carboxy–terminal variable […]

Q. 34 Which one of the following is the most sensitive immunoassay?(A) Immunoelectrophoresis(B) Immunofluorescence(C) Radial immunodiffusion(D) Radioimmunoassay Radioimmunoassay (RIA) is the most sensitive immunoassay among the given options. It detects […]

Q.33 Which one of the following ion channels opens to repolarize the neuronalmembrane when an action potential is generated?(A) Ca2+ channel(B) H+ channel(C) Na+ channel(D) K+ channel Potassium (K+) channels […]

Q.32 Which one of the following DNA repair systems requires DNA glycosylases?(A) Base–excision(B) Direct(C) Mismatch(D) Nucleotide–excision The correct answer is (A) Base-excision repair. DNA glycosylases initiate base-excision repair (BER) by […]