PLANT PHYSIOLOGY
MINERAL NUTRITION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Anabaena and Nostoc are capable of fixing nitrogen in free-living state also
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Root nodule forming nitrogen fixers live as aerobes under free-living conditions.
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Phosphorus is a constituent of cell membranes, certain nucleic acids and all proteins.
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Nitrosomonas and Nitrobacter are chemoautotrophs.
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Detailed explanation-1: -Phosphorus is present in plasma membrane in the form of phospholipid bilayer. It is an essential component of all nucleic acids not ‘certain’ nucleic acids. Moreover, phosphorus is never found in proteins.
Detailed explanation-2: -Phosphorus is a nonmetallic chemical element of the nitrogen family in the Group 15 of the periodic table, which is represented by P. Importance of phosphorus in living organisms is as follows: It is a major constituent of biological membranes. It is a component of nucleic acids.
Detailed explanation-3: -Phosphorus is an essential component of all cells; the element forms the backbone of nucleic acids, without which cells cannot reproduce. Phosphorus is also incorporated in nucleotides, sugars, proteins, and lipids.
Detailed explanation-4: -Root nodule forming nitrogen fixers live as aerobes under free living state. Phosphorus is a constituent of cell membranes, certain nucleic acids and all proteinsNitrosomonas-and Nitrobacter are chemoautotrophs. Solution : • Anabaena and Nostoc are capable of fixing nitrogen in free state.
Detailed explanation-5: -So the correct answer is ‘Root nodule forming nitrogen fixers live as aerobes under free-living conditions’.