Question

Assertion : Nitrogen is one of the most essential elements of human body.
Reason : All types of prokaryotic organisms are able to fix nitrogen.

• A. If both assertion and reason are true and reason is the correct explanation of assertion
• B. If both assertion and reason are true but reason is not the correct explanation of assertion
• C. If assertion is true but reason is false
• D. If both assertion and reason are false

Answer 1

Answer: (C)

Nitrogen is one of the most essential elements of human body. It is a constituent of a number of organic compounds like amino acids, proteins, nucleotides, nucleic acids, many vitamins, hormones etc. Biological N₂ fixation is a very important natural process which is performed by two types of prokaryotes - bacteria and cyanobacteria. They include both free living and symbiotic forms.