AIIMS 2018 Botany Mitochondria MCQ Question
Assertion : Most of the enzymes of oxidative decarboxylation are present in mitochondrial matrix.
Reason : ETS operates on inner membrane of mitochondria
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
Option B, glycolysis, is the process that occurs in the cytoplasm and involves the breakdown of glucose into pyruvate, generating ATP and NADH, which are crucial for subsequent oxidative decarboxylation in the mitochondria. In contrast, the Krebs cycle (option A) occurs in the mitochondrial matrix and is responsible for further oxidizing pyruvate to CO₂ while producing FADH₂ and NADH, but it is not directly involved in the electron transport chain. The electron transport chain (option C) specifically refers to the series of proteins in the inner mitochondrial membrane that transfer electrons from NADH and FADH₂ to O₂, ultimately producing H₂O and ATP through oxidative phosphorylation. The Calvin cycle (option D) is unrelated as it occurs in plants during photosynthesis, converting CO₂ into glucose.
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