Question

question 11 (1 point)
during aerobic cellular respiration, which of the following molecules enters the krebs cycle?
citrate
acetyl coa
pyruvate
oxaloacetate
question 12 (1 point)
how many turns of the krebs cycle occur for the metabolism of a glucose?
2
4
8
16

Explanation:

For Question 11, acetyl - CoA enters the Krebs cycle. Pyruvate is first converted to acetyl - CoA before entering. Citrate is a product of the first reaction in the cycle, and oxaloacetate combines with acetyl - CoA to start the cycle but is not the entering molecule. For Question 12, one glucose molecule is broken down into two pyruvate molecules, and each pyruvate leads to one turn of the Krebs cycle, so 2 turns occur for one glucose.

Answer:

Question 11: B. acetyl coA
Question 12: A. 2