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NEET UG BIOLOGY MCQ: MINERAL NUTRITION
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Assertion: Nitrogenase enzyme gets inactivated in presence of oxygen yet fixation occurs in aerobic cells of legume nodules.
Reason: Leghaemoglobin allows presence of oxygen just sufficient for cellular respiration only.
Reason: Leghaemoglobin allows presence of oxygen just sufficient for cellular respiration only.
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Correct option: A
If both Assertion and Reason are true and Reason is the correct explanation of Assertion
Option A (If both Assertion and Reason are true and Reason is the correct explanation of Assertion) is correct because nitrogenase is oxygen-sensitive, and leghaemoglobin maintains a low oxygen environment.
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I Nitrosomonas – Nitrite to nitrate
II Thiobacillus - Denitrification
III Nostoc - Free-living nitrogen-fixer
IV Azotobacter - Anaerobic nitrogen-fixer Deficiency of which to the following can cause yellowing of intravenous regions of leaves? Which among the following are used as media for hydroponics? Elements mainly involved in cell membrane synthesis, in normal functioning of the cell membrane are The major characteristics of colloids is/are
I Nitrosomonas – Nitrite to nitrate
II Thiobacillus - Denitrification
III Nostoc - Free-living nitrogen-fixer
IV Azotobacter - Anaerobic nitrogen-fixer Deficiency of which to the following can cause yellowing of intravenous regions of leaves? Which among the following are used as media for hydroponics? Elements mainly involved in cell membrane synthesis, in normal functioning of the cell membrane are The major characteristics of colloids is/are