GATE BT format:mcq PYQs & Answers — Page 38

Questions 371–380 of 389. Imported answers require independent review unless marked reviewed.

Topic practice 389 questionsPage 38 of 39

The genome is diploid at the end of which phases of a human mitotic cell cycle?

Your answerChoose one option.

G2 & S

G1 & M

M & S

G1 & G2

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A recombinant protein is to be expressed under the control of the lac promoter and operator in a strain of E. coli having the genotype lac⁺ crp⁺. Even in the absence of inducer IPTG, low levels of expression of the recombinant protein are seen (leak expression). Which one of the following should be done to minimize such leak expression?

Your answerChoose one option.

Addition of lactose to the medium

Removal of all glucose from the medium

Addition of excess glucose to the medium

Addition of allo-lactose to the medium

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Shown below is a plasmid vector (P) and an insert (Q). The insert was cloned into the BamHI site of the vector. The recombinant plasmid was isolated and digested with BamHI or XhoI. The results from the digestion experiments are shown in (R).

Which one of the following explains the digestion results shown in (R)?

Your answerChoose one option.

The insert did not ligate to the vector.

One copy of the insert ligated to the vector.

The insert ligated to the vector as two tandem copies.

The insert ligated to the vector as two copies but not in tandem.

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Which one of the following CANNOT be a recognition sequence for a Type II restriction enzyme?

Your answerChoose one option.

GAATTC

AGCT

GCGCCGC

ATGCCT

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A pedigree of an inheritable disease is shown below.

This inheritable disease is

Your answerChoose one option.

X-linked dominant

X-linked recessive or Y-linked

only Y-linked

only X-linked recessive

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Growth of a microbe in a test tube is modeled as

, where, X is the biomass, r is the growth rate, and K is the carrying capacity of the environment (

;

). If the value of starting biomass is

, which one of the following graphs qualitatively represents the growth dynamics?

Your answerChoose one option.

Diagram for Biotechnology question 48 (figure 2)

Diagram for Biotechnology question 48 (figure 3)

Diagram for Biotechnology question 48 (figure 4)

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The interaction energy E between two spherical particles is plotted as a function of the distance (r) between them. When

, where

is a constant, the net force between the spherical particles is repulsive. When

, they attract via van der Waals attraction. Which one of the following plots correctly represents the interaction energy between the above two particles?

Your answerChoose one option.

Diagram for Biotechnology question 50 (figure 2)

Diagram for Biotechnology question 50 (figure 3)

Diagram for Biotechnology question 50 (figure 4)

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EcoRI restriction sites on a 10kb DNA fragment are shown below.

Upon partial digestion, what are the lengths (in kb) of all the possible DNA fragments obtained?

Your answerChoose one option.

2, 3, 4, 5, 6, 7, 8, and 10

2, 3, 4, 5, 6, and 7

2, 3, 4, and 7

2 and 3

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Which of the following conditions promote the development of human autoimmune disorders?

P. Inability to eliminate self-reactive lymphocytes Q. Generation of auto-antibodies R. Ability to eliminate self-reactive T-cells S. Induction of regulatory T-cells in the thymus

Your answerChoose one option.

P, R

Q, S

P, Q

R, S

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She has a sharp tongue and it can occasionally turn ________.

Your answerChoose one option.

hurtful

left

methodical

vital

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GATE BT format:mcq PYQs

Question 41

Question 42

Question 43

Question 44

Question 45

Question 48

Question 50

Question 51

Question 55

Question 56