AIPMT MAINS 2012 Botany Photosynthesis and Nitrogen Fixation MCQ Question
Read the following four statements (A⁻D):
(A) Both, photophosphorylation and oxidative phosphorylation involve uphill transport of protons across the membrane.
(B) In dicot stems, a new cambium originates from cells of pericycle at the time of secondary growth.
(C) Stamens in flowers of Gloriosa and Petunia are polyandrous.
(D) Symbiotic nitrogen-fixers occur in free-living state also in soil.
How many of the above statements are right?
Two
Three
Four
One
Correct Answer
Detailed Explanation
Statement (A) is correct. Statement (B) is incorrect as cambium originates from the vascular cambium. Statement (C) is incorrect as Gloriosa and Petunia are not polyandrous. Statement (D) is incorrect as symbiotic nitrogen-fixers are not free-living.
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