GATE XL kind:question PYQs & Answers — Page 78

Questions 771–780 of 1235. Imported answers require independent review unless marked reviewed.

One mole of a native protein upon N-terminal analysis yielded one mole each of Asp and Val. Therefore, the protein in its native state exists as a

Your answerChoose one option.

Monomer

Homo-dimer

Hetero-dimer

Tetramer

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The prosthetic groups/cofactors involved in both 1e

and 2e

transfer in the mitochondrial electron transport chain are

Your answerChoose one option.

NAD and NADP

NAD and FAD

Heme and FMN

Coenzyme Q and FMN

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Match the items in Group I with the most appropriate items in Group II and choose the correct option.

Group I: P. Integrin Q. Microglial cell R. TLR-7 S. Dendritic cell

Group II:

Phagocytosis in the neural tissue

Antigen processing by cross-presentation

Single stranded RNA recognition

Binding of cells to endothelium

Your answerChoose one option.

P-2, Q-1, R-3, S-4

P-4, Q-1, R-3, S-2

P-1, Q-2, R-3, S-4

P-4, Q-1, R-2, S-3

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The correct combination of glycosidic linkages present in glycogen is

Your answerChoose one option.

α 1→4 and α 1→6

α 1→4 and β 1→6

α 1→6 and β 1→4

α 1→6 and β 1→6

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Polypeptides are either biosynthesized on the ribosomes using an mRNA template or chemically synthesized by the Merrifield’s solid phase method. The correct directions of peptide synthesis are

Your answerChoose one option.

C→N direction on the ribosomes and N→C direction on the solid phase

N→C direction on the ribosomes and C→N direction on the solid phase

N→C direction in both cases

C→N direction in both cases

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A solution absorbs 20% of the incident light in a cuvette of path length 1.0 cm. The amount of light transmitted by the same solution in a cuvette of 3.0 cm path length is ________% (rounded off to one decimal place).

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The second pKa of phosphoric acid is 6.8. The ratio of Na₂HPO₄ to NaH₂PO₄ required to obtain a buffer of pH 7.0 is ________ (rounded off to two decimal places).

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A PCR in a 100 μL reaction volume, containing two primers at a concentration of 0.2 μM each, is set up to amplify a 250 base pair DNA fragment. Consider the average molecular weight of one base pair as 660 Da. If the primers are fully consumed by the end of the reaction, the amount of the final PCR product formed is __________ μg (rounded off to one decimal place).

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An enzyme obeying Michaelis-Menten kinetics shows a reaction velocity (v) of 10 μmol/min when the substrate concentration [S] equals its Kₘ. The maximal velocity Vₘₐₓ for this enzyme is ______ μmol/min (correct to integer number).

(Kₘ is Michaelis-Menten constant)

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The enzyme glucose isomerase catalyses the inter-conversion of glucose and fructose as shown.

Glucose ⇌ Fructose

The ΔG′₀ for this reaction is zero kcal/mol. After adding glucose isomerase to a 0.12 M glucose solution and allowing the reaction to attain equilibrium, the final concentration of fructose in the reaction mixture will be ______ mM.

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GATE XL kind:question PYQs

Question 11

Question 12

Question 13

Question 14

Question 15

Question 16

Question 17

Question 18

Question 19

Question 20