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Which step of cellular respiration takes place in the cytoplasm and is common to both aerobic and anaerobic respiration?
AGlycolysis
BKrebs cycle
CElectron transport chain
DOxidative phosphorylation
Answer & Solution
Correct answer: A. Glycolysis
1. Glycolysis splits one glucose into two pyruvic acid molecules.
2. It occurs in the cytoplasm of the cell.
3. It is the first step of both aerobic and anaerobic respiration, so it is the common step.
4. The Krebs cycle occurs in the mitochondrial matrix and only in aerobic respiration, so it is ruled out.
_Source: Samacheer Kalvi (TN SCERT) Class 10 Science, Unit 12 Plant Anatomy and Plant Physiology "Stages of Aerobic respiration", p.190_
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