NEET Biology Biomolecules Based Practice Questions & Answers with Viewers Discussion and Detailed Explanation

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Biomolecules Topic Based

Question & Answer Discuss:

Which one of the following is the wrong statement?

(a) Root nodule-forming nitrogen fixers live as aerobes under free-living conditions.

(b) Anabaena and Nostoc are capable of fixing nitrogen in a free-living state also.

(c) Phosphorus is a constituent of cell membranes, certain nucleic acids and all proteins.

(d) Nitrosomonas and Nitrobacter are chemo- autotrophs.

Answer: (c)

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.

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