GATE XL purpose:exam-prep PYQs & Answers — Page 5

Questions 41–50 of 1235. Imported answers require independent review unless marked reviewed.

Which statement(s) is/are true about the 5′-capping of eukaryotic mRNA?

Your answerSelect all correct options. You can choose more than one.

Triphosphate enzyme removes the γ-phosphate from the 5′-terminal nucleotide.

A transferase links ATP to the dephosphorylated nucleotide of mRNA at its 5′-end.

Methyl transferase adds a −CH₃ group to the N-7 position of the newly added guanine base.

5′-capping happens shortly after mRNA emerges from the exit tunnel of RNA polymerase.

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Which of the following statements about pertussis toxin is/are NOT true?

Your answerSelect all correct options. You can choose more than one.

It causes whooping cough.

It is a heteromeric protein.

It causes ADP-ribosylation of the α-subunit of Gᵢ.

It inhibits adenylate cyclase.

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Telomerase has which one or more of the following activities?

Your answerSelect all correct options. You can choose more than one.

DNA-dependent RNA polymerase

Reverse transcriptase

RNA-dependent DNA polymerase

5′ → 3′ exonuclease

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To a

solution of a receptor, its specific ligand was added, and incubated. At equilibrium, the concentration of the free ligand was

, and the concentration of the receptor-ligand complex was

. The dissociation constant for the receptor-ligand interaction is ________

(rounded off to two decimal places).

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Assuming that there are

cell in the human body, and that ATP is turning over at a rate of

ATP molecules per minute in each cell, then the human body is utilizing ______ watts (rounded off to two decimal places).

[Assume that hydrolysis of ATP yields 12 kcal per mole. 1 watt = 1 joule/sec, 1 calorie = 4.18 joules, Avogadro’s number =

]

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A solution shows a transmittance of 20% when taken in a cuvette of 2.5 cm path length. If the molar absorption coefficient of the solution is 1200 dm³/mol.cm, the concentration of the solution is _____ × 10⁵ mol/dm³ (rounded off to two decimal places).

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Which one of the following plant families is characterized by the gynobasic style of female reproductive organ?

Your answerChoose one option.

Lamiaceae

Euphorbiaceae

Malvaceae

Poaceae

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Which one of the following plant organs typically exhibits all the four features listed below? (i) Starch-enriched endodermis (ii) Conjoint, collateral and open vascular bundle (iii) Endarch xylem (iv) Presence of medullary rays

Your answerChoose one option.

Dicot root

Monocot root

Dicot leaf

Dicot stem

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Correctly match the following molecules/methods in Group-I with their major uses in Group-II.

Group-I: (P) CRISPR-Cas9 (Q) DNA Microarray (R) Vir genes (S) RAPD

Group-II: (1) Global gene expression analysis (2) Molecular marker (3) Targeted gene editing (4) Agrobacterium-mediated plant transformation

Your answerChoose one option.

P–1; Q–3; R–2; S–4

P–3; Q–1; R–4; S–2

P–3; Q–1; R–2; S–4

P–1; Q–3; R–4; S–2

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Which one of the following commercial products is used as a systemic fungicide to control plant diseases?

Your answerChoose one option.

Captan

Phaltan

Thiram

Benomyl

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GATE XL purpose:exam-prep PYQs

Question 41

Question 42

Question 43

Question 44

Question 45

Question 46

Question 47

Question 48

Question 49

Question 50