Life Sciences
GATE XL purpose:exam-prep PYQs
Build your understanding with focused practice from past exam papers.
Questions 921–930 of 1235. Imported answers require independent review unless marked reviewed.
Question 16
Open questionXL-RMCQ2 marksNeeds review
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
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Open questionXL-RMCQ2 marksNeeds review
Which one of the following statements is CORRECT with respect to endosperm development? It originates
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Open questionXL-RMCQ2 marksNeeds review
Which one of the following methods is INCORRECT with respect to haploid plant production? It can be produced
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Open questionXL-RNAT2 marksNeeds review
Plant weight is determined by a pair of alleles at each of the two independently assorting loci (A and Bb) that are additive and equal in their effects. The recessive alleles do not contribute towards plant weight. Plants with genotype aa bb are 1 g in weight, whereas plants with genotype AA BB weigh 3.4 g. Plant with genotype aa bb is crossed with a plant of genotype AA BB. The weight (in g, round off to one decimal place) of an individual plant in F₁ progeny of this cross would be
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Open questionXL-RNAT2 marksNeeds review
A cell in G₁ of Interphase has 12 chromosomes. In Anaphase-I of meiosis, the number of DNA molecules per cell will be
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Open questionXL-SMCQ1 markNeeds review
Chloramphenicol and tetracycline are broad spectrum antibiotics which inhibit bacterial growth by targeting __________.
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Which of the following radiation methods is used in preserving food from spoilage by microorganisms?
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Which part of the lipopolysaccharides has toxic properties that make some bacterial infections a potentially serious medical problem?
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Microbes make up about __________ of earth’s living material by weight.
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The highly contagious viral disease measles is caused by a
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