GATE XL 2023 Paper 1 — page 21

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2023 Paper 1

Complete GATE XL 2023 Paper 1 overview, original pages and practice · Timed previous-paper practice

Questions 61–63 of 122. Imported answers require review unless explicitly marked reviewed.

Paper practice 122 questionsPage 21 of 41

A drought tolerant rice genotype was found to be associated with a missense mutation in the gene A. Which one or more of the following experiments is/are appropriate to validate whether the mutation in A is the causal factor for drought tolerance?

Your answerSelect all correct options. You can choose more than one.

Introduce the same mutation in a drought sensitive rice genotype and test if it becomes drought tolerant.

Delete the wild-type A in drought sensitive plant and test if it becomes drought tolerant.

Determine the stability of the protein encoded by the wild-type and the mutant forms of A.

Repair the mutation in the drought tolerant rice genotype and test if it becomes drought sensitive.

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Blue light can directly induce opening of stomata. Blue light also triggers photosynthesis in the guard cells, which indirectly induces stomatal opening. Which one or more of the following experimental approaches would test the direct effect of blue light on stomatal opening?

Your answerSelect all correct options. You can choose more than one.

Application of low photon fluxes of red light followed by high fluence rate of blue light.

Application of high fluence rates of red light followed by low photon fluxes of blue light.

Application of high fluence rates of blue light followed by high photon fluxes of red light.

Inhibition of photosynthetic electron transport by dichlorophenyldimethylurea (DCMU).

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In a diploid angiosperm species, flower colour is regulated by the R gene. RR and Rr genotypes produce red flowers, whereas the rr genotype produces white flowers. If two individual plants are randomly selected from a large segregating population of a genetic cross between RR and rr parents, the probability of both the plants producing red flowers is ______. (Rounded off to two decimal places)

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2023 · Paper 1

Question 61

Question 62

Question 63