Question

question 13 (6 points) glycolysis can be thought of as a two - phase process: the energy investment phase and the energy payoff phase. match each item with the correct statement below. each item may be used only once. most energy in energy investment phase 1. glucose most energy in energy payoff phase 2. glucose - 6 - phosphate results from rearrangement of phosphate group 3. glyceraldehyde - 3 - phosphate least energy in energy investment phase 4. pyruvate results from the phosphorylation of glucose 5. 2 - phosphoglycerate least energy in energy payoff phase 6. 1,3 - bisphosphoglycerate

Explanation:

1. In the energy - investment phase of glycolysis, glucose has the most energy available for the initial reactions to start the process. Glucose - 6 - phosphate is formed from the phosphorylation of glucose, so it results from the phosphorylation of glucose.
2. In the energy - payoff phase, pyruvate is the end - product with relatively high energy yield compared to other intermediates in this phase. Glyceraldehyde - 3 - phosphate can have its phosphate group rearranged during glycolysis reactions.
3. 2 - phosphoglycerate has relatively less energy compared to other intermediates in the energy - investment phase, and 1,3 - bisphosphoglycerate has relatively less energy compared to pyruvate in the energy - payoff phase.

Answer:

1. most energy in energy investment phase: 1. glucose
2. most energy in energy payoff phase: 4. pyruvate
3. results from rearrangement of phosphate group: 3. glyceraldehyde - 3 - phosphate
4. least energy in energy investment phase: 5. 2 - phosphoglycerate
5. results from the phosphorylation of glucose: 2. glucose - 6 - phosphate
6. least energy in energy payoff phase: 6. 1,3 - bisphosphoglycerate