GATE XL 2023 Paper 1 — page 13

Questions 37–39 of 122. Imported answers require review unless explicitly marked reviewed.

Which one of the following amino acids has more than two acid-base groups?

Your answerChoose one option.

Alanine

Leucine

Phenylalanine

Tyrosine

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Enzyme activity profiles as a function of time in the absence or presence of different types of feedback mechanisms are shown in the figure below. Match the following feedback mechanisms with the corresponding profiles in the figure. (p) No feedback mechanism (q) Negative feedback mechanism with short delay (r) Negative feedback mechanism with long delay (s) Positive feedback mechanism

Your answerChoose one option.

(p) – (i); (q) – (ii); (r) – (iii); (s) – (iv)

(p) – (iv); (q) – (iii); (r) – (ii); (s) – (i)

(p) – (iv); (q) – (ii); (r) – (iii); (s) – (i)

(p) – (i); (q) – (iii); (r) – (ii); (s) – (iv)

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A linear DNA fragment of 5 kilobase (kb) when completely digested with EcoRI produces 2.5 kb, 1.5 kb, and 1 kb fragments. Complete digestion of the same 5 kb fragment with XbaI produces 3.5 kb and 1.5 kb fragments. Which one of the following sets of fragments will be obtained if the 5 kb fragment is fully digested with EcoRI and XbaI simultaneously?

Your answerChoose one option.

3 kb and 2 kb

2 kb and 1 kb

2 kb, 1.5 kb, 1 kb, and 0.5 kb

2.5 kb, 1.5 kb, 0.75 kb, and 0.25 kb

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2023 · Paper 1

Question 37

Question 38

Question 39