alleryStart learning →In humans, glucose is first broken down in the cytoplasm into a three-carbon molecule called
Apyruvate
Blactic acid
Cethanol
Dglucose-6-phosphate
Answer & Solution
Correct answer: A. pyruvate
1. The first step of respiration (glycolysis) occurs in the cytoplasm.
2. Glucose (6 C) is broken into two molecules of **pyruvate** (3 C each).
3. Pyruvate is then processed further, aerobically or anaerobically.
_Source: Karnataka SSLC (KSEEB) Class 10 Science, Ch6 'Life Processes', §6.3_
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