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Q.48 Which of the following is the closest ancestor of all land plants? (A) Blue green algae (B) Red algae (C) Chara (D) Coleochaeteae The correct answer is: (D) Coleochaeteae. In […]

Q.47 Which of the following does NOT use xylem to transport water? (A) Miscanthus (B) Marchantia (C) Selaginella (D) Magnolia The correct answer is: (B) Marchantia. Marchantia is a non‑vascular bryophyte […]

Q.46 Which of the following is most abundant in the aleurone layer of wheat seeds? (A) Tannin (B) Starch (C) Protein (D) Lipid The correct answer is: (C) Protein. The aleurone layer […]

Q.45 The sequence of a polypeptide that forms a transmembrane helix is shown below. Which one of the following segments of the peptide is most likely to span the membrane? […]

Q.44 An N-terminal His-tagged protein of molecular weight 40 kDa was purified using Ni-NTA column. This protein sample was subjected to SDS-PAGE. A western blot of the same using anti-His […]

Q.43 A polypeptide with the amino acid sequence ‘AGKPDHEKAHL’ was dissolved in a buffer of pH 1.8. The predominant form of the polypeptide will have a net charge of (A) […]

Q.42 Kinetic parameters for the enzyme fumarase with three different substrates are given below. Substrate                                […]

Q.41 Aspartate residues are found in the active sites of many enzymes. The 𝐩𝐊𝐚 for the 𝜷-carboxylate of aspartate is 3.86 . At physiological pH this group can function as […]

Q.40 An enzyme was purified using ion-exchange chromatography and the results are shown in the table below. Step                          […]

Q.39 Three micrograms of a circular plasmid of 4200 bp was digested with a restriction enzyme and subjected to agarose gel electrophoresis. Five DNA fragments of different sizes were observed […]