Question

how many co₂ are released per glucose molecule in the citric acid cycle?
2
1
6
3
4
11 true or false 1 point
even though the full oxidation of glucose is exergonic, some of the reactions in cellular respiration are endergonic.
true
false
12 multiple choice 1 point
which one of the following is not a product of cellular respiration?
atp
carbon dioxide
all of the choices are correct.
oxygen
water

Explanation:

1. In the citric - acid cycle, for each glucose molecule (which is broken down into two pyruvate molecules, and each pyruvate enters the citric - acid cycle), a total of 6 CO₂ are released. One pyruvate molecule entering the cycle releases 3 CO₂, and since glucose gives 2 pyruvate molecules, 6 CO₂ are released.
2. The full oxidation of glucose is exergonic overall, but some individual reactions in cellular respiration, like the phosphorylation steps, are endergonic and are coupled with exergonic reactions to drive the overall process forward.
3. Oxygen is a reactant in cellular respiration (used in the final electron - acceptor step in oxidative phosphorylation), not a product. The products of cellular respiration are ATP, carbon dioxide, and water.

Answer:

1. C. 6
2. True
3. D. oxygen