GATE XL format:mcq PYQs & Answers — Page 58

Questions 571–580 of 812. Imported answers require independent review unless marked reviewed.

Match the plant species and their corresponding families with the economically important products:

Your answerChoose one option.

P-2-iv, Q-3-ii, R-4-iii, S-1-i

P-3-iv, Q-2-i, R-1-ii, S-4-iii

P-1-ii, Q-4-iii, R-2-i, S-3-ii

P-2-iv, Q-4-iii, R-1-ii, S-3-i

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

Cybirds may arise through the

Your answerChoose one option.

fusion of a normal protoplast with another nucleated protoplast of different origin

fusion between a normal protoplast and a protoplast containing viable nucleus

elimination of one of the nuclei from heterokaryon formed from two protoplasts of different origin

fusion of a normal cell with another nucleated cell

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

Match the disease with causative organism and affected crop

Your answerChoose one option.

P-3-i, Q-1-iv, R-2-iii, S-4-ii

P-3-ii, Q-1-iv, R-4-i, S-2-iii

P-4-ii, Q-1-i, R-3-iv, S-2-iii

P-2-iii, Q-3-ii, R-1-iv, S-4-i

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

Match the options in Group I with that of Group II with respect to steps in signal transduction mechanism in plants

Group I P. Phospholipase C Q. Inositol triphosphate R. Diacylglycerol S. Phosphatidic acid

Group II

stimulates release of calcium from intracellular stores

regulates ion channels/activates various enzymes

hydrolyzes phosphatidylinositol bisphosphate (PIP2)

phosphorylated to phosphatidic acid

Your answerChoose one option.

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

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

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

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

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

Which one of the following statements is CORRECT with respect to endosperm development? It originates

Your answerChoose one option.

from the fusion product of three haploid nuclei - one from male gametophyte and two from the female gametophyte

from the fusion product of three haploid nuclei - two from male gametophyte and one from the female gametophyte

from the fusion product of two haploid nuclei - one from male gametophyte and one from the female gametophyte

by a phenomenon called apomixis

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

Which one of the following methods is INCORRECT with respect to haploid plant production? It can be produced

Your answerChoose one option.

from an unfertilized egg cell

from nucellar tissue

from isolated pollen culture

by distant hybridization, followed by selective elimination of chromosomes of one of the parents

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

Chloramphenicol and tetracycline are broad spectrum antibiotics which inhibit bacterial growth by targeting __________.

Your answerChoose one option.

cell wall synthesis

protein synthesis

RNA synthesis

DNA synthesis

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

Which of the following radiation methods is used in preserving food from spoilage by microorganisms?

Your answerChoose one option.

Radio waves

Microwaves

Non-ionizing

Ionizing

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

Which part of the lipopolysaccharides has toxic properties that make some bacterial infections a potentially serious medical problem?

Your answerChoose one option.

Polysaccharide side-chains

Lipid A portion

Repeat carbohydrate units

Core region of polysaccharides

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

Microbes make up about __________ of earth’s living material by weight.

Your answerChoose one option.

1/4th

2/3rd

3/4th

4/5th

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

GATE XL format:mcq PYQs

Question 13

Question 14

Question 15

Question 16

Question 17

Question 18

Question 1

Question 2

Question 3

Question 4