Question

question 15
the stored energy in food is converted by cells into this useable energy - containing molecule.
(a) glycogen
(b) adp
(c) atp
(d) amp
(e) glucose
question 16
oxygen is most directly important in which of the following stage(s) of aerobic respiration?
(a) glycolysis
(b) the citric acid cycle
(c) electron - transport chain
(d) a and c but not b
(e) none of the above.

Explanation:

1. For the first question, cells convert the stored energy in food into adenosine - triphosphate (ATP), which is the usable energy - containing molecule for cells. Glycogen is a storage form of glucose in animals. ADP (adenosine diphosphate) can be converted to ATP to store energy. AMP (adenosine monophosphate) is a part of the ATP - ADP system. Glucose is a sugar molecule that is broken down to produce ATP.
2. For the second question, in aerobic respiration, oxygen is most directly important in the electron - transport chain. Oxygen acts as the final electron acceptor in the electron - transport chain, allowing the production of a large amount of ATP. Glycolysis is an anaerobic process (can occur without oxygen). The citric acid cycle does not directly use oxygen but is part of the overall aerobic respiration process that leads to the electron - transport chain where oxygen is used.

Answer:

Question 15: C. ATP
Question 16: C. electron - transport chain