- A) both (A) and (R) true, (R) is correct reason
- B) both (A) and (R) true, (R) not correct reason
- C) (A) true, (R) false
- D) (A) false, (R) true
GATE BT 2010
Total MCQ: 47
22 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 1.0 could be apparently due to
- A) substrate-uninhibited kinetics with internal pore diffusion limitation
- B) external pore diffusion limitation
- C) sigmoidal kinetics
- D) instability of the enzyme
23 The formation of peptide cross-links between adjacent glycan chains in cell wall synthesis is called
- A) transglycosylation
- B) autoglycosylation
- C) autopeptidation
- D) transpeptidation
24 Oxidation-reduction reactions with positive standard redox potential (ΔE°′) have
- A) positive ΔG°′
- B) negative ΔG°′
- C) positive ΔE°′
- D) negative ΔE°′
25 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
26 Identify the enzyme that catalyzes the following reaction α-Ketoglutarate + NADH + NH₄⁺ + H⁺ → Glutamate + NAD⁺ + H₂O
- A) Glutamate synthase
- B) Glutamate oxoglutarate aminotransferase
- C) Glutamate dehydrogenase
- D) α-Ketoglutarate deaminase
27 The degree of inhibition for an enzyme-catalyzed reaction at a particular inhibitor concentration is independent of initial substrate concentration. The inhibition follows
- A) competitive inhibition
- B) mixed inhibition
- C) un-competitive inhibition
- D) non-competitive inhibition
28 During lactic acid fermentation, net yield of ATP and NADH per mole of glucose is
- A) 2 ATP and 2 NADH
- B) 2 ATP and 0 NADH
- C) 4 ATP and 2 NADH
- D) 4 ATP and 0 NADH
29 Expressed Sequence Tag is defined as
- A) partial sequence of a codon randomly selected from cDNA library
- B) the characteristic gene expressed in the cell
- C) the protein coding DNA sequence of a gene
- D) uncharacterized fragment of DNA present in the cell
30 In a chemostat operating under steady state, a bacterial culture can be grown at dilution rate higher than maximum growth rate by
- A) partial cell recycling
- B) using sub-optimal temperature
- C) pH cycling
- D) substrate feed rate cycling