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The respiratory pathway is described as 'amphibolic' because it
AOperates exclusively at a neutral pH
BOccurs only in plants and not animals
CBoth catabolic and anabolic in function
DProceeds in only one fixed direction
Answer & Solution
Correct answer: C. Both catabolic and anabolic in function
Amphibolic = both catabolic and anabolic. TCA intermediates can leave the cycle for biosynthesis (e.g., OAA to aspartate, alpha-KG to glutamate, acetyl CoA to fatty acids). The cycle therefore serves both energy and biosynthesis.
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