GATE XL 2017 Paper 1 — page 16

Questions 46–48 of 125. Imported answers require review unless explicitly marked reviewed.

Choose the CORRECT set of matches between group I and group II in relation to nitrogen fixation and assimilation

GROUP I P. Nitrobacter Q. Nitrite reductase R. Nitrogenase S. Nitrate reductase

GROUP II

NO₃⁻ → NO₂⁻

N₂ → 2NH₃

NO₂⁻ → NH₄⁺

NO₂⁻ → NO₃⁻

Your answerChoose one option.

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

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

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

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

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Two plant cells M and N are lying side by side making direct contact. “M” has osmotic potential (Ψs) of -10 bar and pressure potential (Ψp) of 4 bar. On the other hand, “N” has osmotic potential (Ψs) of -12 bar and pressure potential (Ψp) of 5 bar.

Based on these data, what would be the direction of movement of water between M and N?

Your answerChoose one option.

M to N

N to M

There will be no movement

In both directions

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Two independent non-segregating recessive mutants (m1 and m2) display similar defects in petal formation. When they were crossed with each other (m1 × m2), all the F1 plants developed normal petals. In view of this observation, which of the following conclusions is CORRECT?

Your answerChoose one option.

Mutations in both m1 and m2 are in the same gene

Mutations in both m1 and m2 are in two separate genes

Inheritance is non-Mendelian

None of the above

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2017 · Paper 1

Question 46

Question 47

Question 48