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Per NCERT Class 10 Biology Ch 5, what is the FIRST STEP common to all forms of cellular respiration?
ACombination of pyruvate with oxygen
BFormation of ATP directly from glucose
CBreak-down of glucose (six-carbon molecule) into pyruvate (three-carbon molecule) in the cytoplasm
DRelease of CO₂ from the lungs
Answer & Solution
Correct answer: C. Break-down of glucose (six-carbon molecule) into pyruvate (three-carbon molecule) in the cytoplasm
Per NCERT §5.3, glucose → pyruvate in cytoplasm is common first step. Further pathways differ between aerobic + anaerobic.
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