Given below are two statements: one is labelled Assertion(A) and other is labelled Reason(R).
Assertion (A): Erythrocytes that transport O₂ to all the tissues cannot utilise O₂ for their cellular respiration.
Reason (R): Erythrocytes cannot respire aerobically because they do not contain mitochondria.
In the light of above statements, choose the correct answer from the options given below.

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Both (A) and (R) are correct but (R) is not the correct explanation of (A).

Both (A) and (R) are correct and (R) is the correct explanation of (A).

(A) is correct but (R) is not correct.

Both (A) and (R) are incorrect.

answer is A.

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Detailed Solution

Both Assertion (A) and Reason (R) are correct, and Reason (R) is the correct explanation for Assertion (A).

Assertion (A) is correct. Erythrocytes, also known as red blood cells, primarily transport oxygen (O₂) to all the tissues in the body. They are highly efficient at binding to oxygen in the lungs and releasing it to body tissues that need it. However, erythrocytes do not utilise the oxygen they carry for cellular respiration.

Reason (R) is correct. Erythrocytes lack mitochondria, which are the cellular organelles responsible for aerobic respiration (the process of using oxygen to produce energy in the form of ATP). Because erythrocytes lack mitochondria, they are unable to perform aerobic cellular respiration, which is a correct explanation for why they cannot utilise the oxygen they transport for their own energy needs.

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