Biotechnology
GATE BT topic:biochemistry PYQs
Build your understanding with focused practice from past exam papers.
Questions 31–40 of 52. Imported answers require independent review unless marked reviewed.
Question 37
Open questionBTMSQ2 marksNeeds review
Which of the following chemical messenger(s) is/are derivative(s) of tryptophan?
Your answerSelect all correct options. You can choose more than one.
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Protein P becomes functional upon phosphorylation of a serine residue. Replacing this serine with __________ will result in a phosphomimic mutant of P.
Your answerChoose one option.
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You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 12
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Which of the following types of molecules act as biological catalysts?
[P] Protein
[Q] RNA
[R] Phospholipid
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Which of the following are energy transducing membranes?
[P] Plasma membrane of bacteria
[Q] Inner membrane of chloroplasts
[R] Inner membrane of mitochondria
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The number of molecules of a nucleotide of molecular weight 300 g/mol present in 10 picomoles is ____________ × 10¹² (round off to 2 decimal places).
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Open questionBTMCQ2 marksNeeds review
Which of the following strategies are used by cells for metabolic regulation?
[P] Phosphorylation - dephosphorylation
[Q] Allostery
[R] Feedback inhibition
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Protein A and protein B form a covalent complex. Gel filtration chromatography of this complex showed a peak corresponding to 200 kDa. SDS-PAGE analysis of this complex, with and without beta-mercaptoethanol, showed a single band corresponding to molecular weight 50 and 25 kDa, respectively. Given that the molecular weight of protein A is 25 kDa, the molecular weight of protein B is __________ kDa.
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Which one of the following statements is CORRECT for enzyme catalyzed reactions? (
is Gibbs free energy change,
is equilibrium constant)Your answerChoose one option.
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Protein concentration of a crude enzyme preparation was 10 mg mL⁻¹. 10 μL of this sample gave an activity of 5 μmol min⁻¹ under standard assay conditions. The specific activity of this crude enzyme preparation is __________ units mg⁻¹.
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In general, which one of the following statements is NOT CORRECT?
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