Single Answer MCQ
Q-00019703
Which common non-metal is essential for respiration in living organisms?
1
Helium
2
Oxygen
3
Carbon
4
Nitrogen
Answer and Solution
Answer
B. Oxygen
Solution:
Oxygen is essential for respiration in living organisms, allowing them to convert food into energy. Helium is inert, carbon is used in other biochemical processes, and nitrogen is more involved in nutrient cycling than respiration.
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