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Which one of the following is a WRONG statement?

  1. A
    Nitrosomonas and Nitrobacter are chemoautotrophs
  2. B
    Anabaena and Nostoc are capable of fixing nitrogen in free-living state also
  3. C
    Root nodule forming nitrogen fixers live as aerobes under free-living conditions
  4. D
    Phosphorus is a constituent of cell membranes, certain nucleic acids and all proteins

Solution & Step-by-step Explanation

Phosphorus is a key constituent of cell membranes (phospholipids), all nucleic acids (DNA/RNA), and some proteins (phosphoproteins). However, it is not present in all proteins. Most proteins are primarily made of C, H, O, N, and sometimes S (Cysteine/Methionine).

Practice this question

Try it yourself before checking the explanation above.

Which one of the following is a WRONG statement?
A
Nitrosomonas and Nitrobacter are chemoautotrophs
B
Anabaena and Nostoc are capable of fixing nitrogen in free-living state also
C
Root nodule forming nitrogen fixers live as aerobes under free-living conditions
D
Phosphorus is a constituent of cell membranes, certain nucleic acids and all proteins

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Mineral NutritionNitrogen Cycle

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