GATE BT kind:question PYQs & Answers — Page 63

Questions 621–630 of 650. Imported answers require independent review unless marked reviewed.

Topic practice 650 questionsPage 63 of 65

Which one of the following organisms is responsible for crown gall disease in plants?

Your answerChoose one option.

Xanthomonas campestris

Rhizobium etli

Agrobacterium tumefaciens

Erwinia stewartii

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The value of c for which the following system of linear equations has an infinite number of solutions is ________.

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Match the plant hormones in Column I with functions in Column II.

Column I: P. Gibberellic acid Q. Zeatin R. Ethylene S. Abscisic acid

Column II:

Seed and bud dormancy

Fruit ripening

Delaying leaf senescence

Regulation of plant height

Your answerChoose one option.

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

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

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

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

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For an E. coli culture in the exponential phase of growth, optical density (OD) at 540 nm is 0.3 at 2 hours and 0.6 at 4 hours. Assuming that the measured OD is linearly proportional to the number of E. coli cells, the growth rate (per hour) for this culture is ________.

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An immunocompetent person becomes infected with a pathogenic strain of bacteria. Which one of the following graphs correctly depicts bacterial load in this person over time?

Your answerChoose one option.

Diagram for Biotechnology question 40 (figure 2)

Diagram for Biotechnology question 40 (figure 3)

Diagram for Biotechnology question 40 (figure 4)

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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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GATE BT kind:question PYQs

Question 36

Question 37

Question 38

Question 39

Question 40

Question 41

Question 42

Question 43

Question 44

Question 45