Carefully read the following reactions carried out by nitrogen-fixing bacteria. Identify the statement about these equations which is not true:

Question

$2 NH subscript 3 space end subscript plus 3 straight O subscript 2 rightwards arrow 2 NO subscript 2 superscript minus plus 2 straight H to the power of plus plus 2 straight H subscript 2 straight O minus negative negative negative left parenthesis straight A right parenthesis 2 NO subscript 2 superscript minus plus straight O subscript 2 rightwards arrow 2 NO subscript 3 superscript minus minus negative negative negative left parenthesis straight B right parenthesis$

Step (A) is carried out by Nitrosomonas or Nitrococcus.

Step (B) is carried out by Nitrobacter.

Both steps (A) and (B) can be called nitrification.

Both steps occur only in photoautotrophs.

Solution

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