GATE XL 2019 Paper 1 — page 21

Questions 61–63 of 125. Imported answers require review unless explicitly marked reviewed.

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

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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

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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

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2019 · Paper 1