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Q.42 Which of the following statements about IgA is/are correct?(A) It is secreted into colostrum.(B) It is transported across the cell by transcytosis.(C) Its secretion is facilitated by poly-Ig receptor.(D) […]

Q.41 Which of the following carbohydrates has/have a 𝛽1 → 4 glycosidic linkage?(A) Cellulose(B) Chitin(C) Lactose(D) Maltose Cellulose, chitin, and lactose contain β1→4 glycosidic linkages, while maltose has an α1→4 […]

Q.40 Purification of 6×His-tagged protein using Ni-NTA column is an exampleof ________(A) affinity chromatography(B) hydrophobic-interaction chromatography(C) ion-exchange chromatography(D) size-exclusion chromatography Purification of 6×His-tagged protein using Ni-NTA column is an example […]

Q.39 Which one of the following enzymes converts testosterone to estradiol?(A) Aromatase(B) 3β-hydroxysteroid dehydrogenase(C) 5α-reductase(D) 17β-hydroxysteroid dehydrogenase Aromatase is the enzyme that converts testosterone to estradiol through aromatization. This multiple-choice […]

Q.38 Which of the following statements about endogenous synthesis of insulin arecorrect?P. Insulin is synthesized as preproinsulin.Q. Preproinsulin is converted to proinsulin.R. Single-site cleavage of proinsulin eliminates C chain.S. Mature […]

Q.37 Two RNAs shown below were used separately as templates in an in vitrotranslation system, which can generate proteins in all possible reading frames. RNA1: 5′ − (AG)n − 3′ […]

Q.36 Filamentous photosynthetic algae were placed on a microscopic slide andilluminated with light of different colors as illustrated.The bacteria that are known to migrate towards the region of high 𝑂ଶ […]

Q.35 The absorbance of a 5 × 10−4 M solution of tyrosine at 280 nm wavelength is 0.75. The path length of the cuvette is 1 cm. The molar absorption […]

Q.34 The number of ATP molecules required for the complete assimilation of onemolecule of CO2 in Calvin cycle is _____. The number of ATP molecules required for complete assimilation of […]

Q.33 The 𝑝𝐾a values of the carboxylic and amino groups of an amino acid with anon-ionizable side chain are 2.17 and 9.13 , respectively. The isoelectric point(rounded off to two places […]