Question

Which gas is present in the highest percentage in the atmosphere? How is it useful to living beings?

Answer 1

Answer:

Nitrogen 78%

It is used to make amino acids in our body which in turn make proteins. It is also needed to make nucleic acids, which form DNA and RNA. Human or other species on earth require nitrogen in a 'fixed' reactive form.

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Answer 2

Answer:

Nitrogen — 78 percent

Nitrogen is essential for all living things because it is a major part of amino acids, which are the building blocks of proteins and of nucleic acids such as DNA, which transfers genetic information to subsequent generations of organisms.

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