Oxidation-reduction reactions with positive standard redox potential (E⁰’) have (A) positive ΔG⁰ (B) negative ΔG⁰ (C) positive ΔE⁰’ (D) negative ΔE⁰’
1 Answer Q.8 During transcription (A) DNA Gyrase introduces negative supercoils and DNA Topoisomerase I removes negative supercoils (B) DNA Topoisomerase I introduces negative supercoils and DNA Gyrase removes negative supercoils (C) both DNA Gyrase and DNA Topoisomerase I introduce negative supercoils (D) both DNA Gyrase and DNA Topoisomerase I remove negative supercoils
1 Answer Nuclease-hypersensitive sites in the chromosomes are sites that appear to be (A) H2 and H4 histone free (B) H1 and H2 histone free (C) H3 and H4 histone free (D) Nucleosome free
1 Answer Q.9 Under stress conditions bacteria accumulate (A) ppGpp (Guanosine tetraphosphate) (B) pppGpp (Guanosine pentaphosphate) (C) both ppGpp and pppGpp (D) either ppGpp or pppGpp
1 Answer The formation of peptide cross-links between adjacent glycan chains in cell wall synthesis is called (A) Transglycosylation (B) Autoglycosylation (C) Autopeptidation (D) Transpeptidation
1 Answer An example for template-independent DNA polymerase is (A) DNA Polymerase I (B) RNA polymerase (C) Terminal deoxynucleotidyl transferase (D) DNA polymerase III
1 Answer Determine the correctness or otherwise of the following Assertion (a) and the Reason (r): Assertion: Somatic embryogenesis in plants is a two-step process comprising of embryo initiation followed by embryo production. Reason: Embryo initiation is independent of the presence of 2,4-dichlorophenoxyacetic acid whereas embryo production requires a high concentration of 2,4-dichlorophenoxyacetic acid. (A) both (a) … Read more
1 Answer Which one of the following DOES NOT belong to the domain of Bacteria? (A) Cyanobacteria (B) Proteobacteria (C) Bacteroids (D) Methanobacterium
1 Answer An immobilized enzyme being used in a continuous plug flow reactor exhibits an effectiveness factor (η) of 1.2. The value of η being greater than 1 could be apparently due to (A) substrate inhibited kinetics with external pore diffusion limitation (B) internal pore diffusion limitation (C) sigmoidal kinetics (D) unstability of the enzyme
1 Answer Interferon-β is produced by (A) bacteria infected cells (B) virus infected cells (C) both virus and bacteria infected cells (D) fungi infected cells
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Sourav Pan
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BNO Team