Why is nitrogen not the main respiratory gas even though it is most abundant in the atmosphere?
Answer and explanation
Correct answer: Because it is relatively less reactive, while living organisms mainly use oxygen for respiration
The governing concept is that atmospheric abundance does not automatically determine respiratory function. Nitrogen makes up the largest share of air, but under ordinary conditions it is relatively unreactive and is not directly used by humans and most animals to release energy from food. Oxygen acts as the key electron acceptor in aerobic respiration. Therefore option B is correct; nitrogen is not water vapour, dust, or ozone.
Frequently asked questions
What is the correct answer to this question?
Because it is relatively less reactive, while living organisms mainly use oxygen for respiration
Why is this the correct answer?
The governing concept is that atmospheric abundance does not automatically determine respiratory function. Nitrogen makes up the largest share of air, but under ordinary conditions it is relatively unreactive and is not directly used by humans and most animals to release energy from food. Oxygen acts as the key electron acceptor in aerobic respiration. Therefore option B is correct; nitrogen is not water vapour, dust, or ozone.
Which subject and chapter does this question cover?
This is a Class 11 Accountancy question. Chapter: Depreciation, Provisions, and Reserves.
