Question

what carbon molecule is made into pyruvate?
a oxygen
b carbon dioxide
c atp
d glucose

Explanation:

Glycolysis is the metabolic pathway that breaks down glucose. In glycolysis, a single glucose molecule (a 6 - carbon molecule) is converted into two pyruvate molecules (each is a 3 - carbon molecule).

• Oxygen (\(O_2\)) is involved in aerobic respiration as the final electron acceptor in the electron transport chain, not directly converted to pyruvate.
• Carbon dioxide (\(CO_2\)) is a product of cellular respiration (e.g., in the citric acid cycle), not a precursor to pyruvate.
• ATP (adenosine triphosphate) is the energy - carrying molecule in cells. It is produced (and consumed) during glycolysis, but it is not converted into pyruvate.

Answer:

d. glucose