Tag: GATE Biotechnology Previous Year Papers with Solutions

Q.56 The empirical formula for biomass of an unknown organism is CH1.8O0.5N0.2. To grow this organism, ethanol (C2H5OH) and ammonia are used as carbon and nitrogen sources, respectively. Assume no […]

Q.55 Analysis of a hexapeptide using enzymatic cleavage reveals the following result: Amino acid composition of the peptide is: 2R, A, V, S, Y Trypsin digestion yields two fragments and […]

Q.54 The activity of lactate dehydrogenase can be measured by monitoring the following reaction: Pyruvate + NADH  →  Lactate + NAD+ The molar extinction coefficient of NADH at 340 nm […]

Q.53 The molar extinction coefficients of Trp and Tyr at 280 nm are 5690 M−1·cm−1 and 1280 M−1·cm−1, respectively. The polypeptide chain of yeast alcohol dehydrogenase(37 kDa) contains5 Trp and […]

Q.52 In an assay of the type II dehydroquinase of molecular mass 18 kDa, it is found that the Vmax of the enzyme is 0.0134 μmol·min−1 when 1.8 μg enzyme […]

Q.51 Choose the CORRECT combination of True (T) and False (F) statements about microcarriers usedin animal cell culture.P. Higher cell densities can be achieved using microcarriersQ. Microcarriers increase the surface […]

Q.50 In animal cell culture, a CO2 enriched atmosphere in the incubator chamber is used to maintain theculture pH between 6.9 and 7.4. Which one of the following statements is […]

Q.49 Which one of the following statements regarding G proteins is INCORRECT?(A) GDP is bound to G protein in the resting stage(B) GTP bound α subunit cannot reassemble with βγ dimer(C) All […]

Q.48 Which of the following statement(s) is/are CORRECT for antigen activated effector T cells?P. CD4+ cells make contact with macrophages and stimulate their microbicidal activityQ. CD4 + cells make contact […]

Q.47 Find the INCORRECT combination.(A) Surface immunoglobulins ̶ B cell antigen receptor(B) Affinity maturation ̶ isotype switching(C) Fc region of antibodies ̶ binding to complement proteins(D) Spleen, the secondary lymphoid […]