AIIMS 2018 Botany Blood MCQ Question
Assertion : Mitochondria are absent in RBC.
Reason : RBC form by glycolysis.
Both A and R are true and R is the correct explanation of A.
Both A and R are true but R is not correct explanation of A
A is true but R is false
A and R are false
Correct Answer
Detailed Explanation
Mature red blood cells (RBCs) lack mitochondria, which are essential for aerobic respiration, thus they rely solely on anaerobic respiration to metabolize glucose. In this process, glucose (C₆H₁₂O₆) is converted into pyruvate through glycolysis, producing ATP without the use of oxygen, and subsequently, pyruvate is further reduced to lactate. Option (A) is incorrect because aerobic respiration requires oxygen and mitochondria, which RBCs do not possess, while option (C) is incorrect as it implies both types of respiration occur, which is not the case for mature RBCs.
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