Question

question 9 (1 point)
in which stage of cellular respiration is carbon dioxide produce?
krebs cycle
glycolysis
pyruvate oxidation
two of the above stages produce carbon dioxide
question 10 (1 point)
the net total of atp molecules produced by substrate - level phosphorylation combined for one molecule of glucose in the glycolysis stage is:
2
4
6
32

Explanation:

• For Question 9: In cellular respiration, carbon - dioxide is produced during pyruvate oxidation and the Krebs cycle. Pyruvate oxidation converts pyruvate to acetyl - CoA and releases carbon dioxide, and the Krebs cycle further breaks down acetyl - CoA and releases carbon dioxide. Glycolysis does not produce carbon dioxide.
• For Question 10: In the glycolysis stage, for one molecule of glucose, the net total of ATP molecules produced by substrate - level phosphorylation is 2. Four ATPs are produced in glycolysis, but two are used in the early steps, resulting in a net gain of 2 ATPs by substrate - level phosphorylation.

Answer:

Question 9: D. two of the above stages produce carbon dioxide
Question 10: A. 2