Which one of the following is a wrong statement?
Correct answer: C. Phosphorus is a constituent of cell membranes, certain nucleic acids, and all proteins
- A. Anabaena and Nostoc are capable of fixing nitrogen in a freeliving state also
- B. Root nodule-forming nitrogen fixers live as aerobes under freeliving conditions
- C. Phosphorus is a constituent of cell membranes, certain nucleic acids, and all proteins
- D. Nitrosomonas and nitrobacteria are chemo autotrophs
Explanation
Phosphorus is present in the plasma membrane in the form of a phospholipid bilayer. It is an essential component of all nucleic acids- not 'certain' nucleic acids. Moreover, phosphorus is only sometimes found in proteins.
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