IIT JAM Biotechnology

Which of the following statement(s) about eukaryotic DNA topoisomerase is/are correct? (A) Topoisomerase I creates transient single-strand breaks (B) Topoisomerase I creates transient double-strand breaks (C) Topoisomerase II creates transient single-strand breaks (D) Topoisomerase II creates transient double-strand breaks

Which of the following method(s) is/are used to estimate protein concentration? (A) Anthrone (B) Biuret (C) Bradford (D) Lowry

Which of the following is/are example(s) of a lotic ecosystem? (A) Lake (B) Pond (C) River (D) Stream

Which of the following statement(s) about the effect of genetic drift is/are correct? (A) It can cause changes in the frequency of alleles at random (B) It is a mechanism of evolution (C) It can lead to loss of genetic variation within small populations (D) It is significant in large populations

Which of the following technique(s) can be used to determine the three-dimensional structure of an organic compound? (A) Mass spectrometry (B) NMR spectroscopy (C) UV-visible spectroscopy (D) X-ray crystallography

Which of the following entity(ies) is/are found inside the intact nucleus of eukaryotic cells? (A) Centrosome (B) Lysosome (C) Nucleolus (D) Nucleosome

Which of the following is/are trace element(s)? (A) Mn (B) P (C) S (D) Zn

Which of the following is/are true about Retrovirus? (A) It contains double-stranded RNA genome (B) It can cause cancer (C) It contains reverse transcriptase (D) It contains double-stranded DNA genome

An object is placed 15 cm in front of a convex mirror, which has a radius of curvature 30 cm. Which one of the following is true of the image formed? (A) Real and inverted (B) Real and upright (C) Virtual and inverted (D) Virtual and upright

If a variable z shows a standard normal distribution, then the percent probability that 0≤z2≤1 is (rounded off to the nearest integer). (A) 34 (B) 68 (C) 95 (D) 99