Question
Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A) : Cells of different tissues essentially require $CO_2$ to generate energy and perform metabolic functions.
Reason (R) : Deficiency of oxygen or hypoxia results in failure to carry metabolic functions.
In the light of the above statements, choose the most appropriate answer from the options given below :
This question was previously asked in
CUET PG 2026 Agri-Business Management Question Paper (25-Mar-2026) (Shift 2)
The correct answer is
(A) is not correct but (R) is correct
Assertion (A) and Reason (R) Evaluation: Cell Metabolism
Cell Energy and Metabolic Functions
Let's evaluate the given statements:
-
Assertion (A): "Cells of different tissues essentially require $CO_2$ to generate energy and perform metabolic functions."
- Cellular energy generation, mainly through aerobic respiration, fundamentally requires oxygen ($O_2$) as the final electron acceptor.
- Carbon dioxide ($CO_2$) is typically a waste product of aerobic respiration, not a requirement for energy generation itself.
- Therefore, Assertion (A) is incorrect.
-
Reason (R): "Deficiency of oxygen or hypoxia results in failure to carry metabolic functions."
- Oxygen ($O_2$) is critical for aerobic respiration, the primary pathway cells use to produce ATP (energy).
- Hypoxia (lack of oxygen) severely impairs or halts aerobic respiration, drastically reducing ATP production.
- This energy deficit prevents cells from performing essential metabolic functions.
- Therefore, Reason (R) is correct.
Conclusion on Statements
Based on the analysis:
- Assertion (A) is incorrect.
- Reason (R) is correct.
This corresponds to the option stating that (A) is not correct but (R) is correct.
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