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Cellular Respiration Review Questions

Review Items

glycolysis

formation of acetyl CoA

Krebs cycle

electron transport system, chemiosmosis

fermentation

Review Questions

1. List in order the steps involved in the breakdown of glucose. [answer]

Which of these steps occurs in the cytoplasm? [answer] In the mitochondria? [answer]

Which of these steps is (are) anaerobic? [answer]

Which of these steps produces the most CO2? [answer]

What step produces the most ATP? [answer]

Name the end product produced by each of these steps. [answer]

2. Draw glycolysis [answer]

Tell how many carbon atoms are present in glucose and in pyruvate. [answer]

List the kinds of high-energy molecules are produced and tell how many. [answer]

3. Draw the reaction that forms Acetyl CoA [answer]

        List the kinds of high-energy molecules produced during the synthesis of acetyl CoA. [answer]

4. Draw the Krebs cycle. [answer]

Tell how many carbon atoms are present in each of the compounds produced by the Krebs cycle. [answer]

List the kinds of high-energy molecules are produced and tell how many are produced during one turn of the cycle. [answer]

5. How many ATP are produced by the complete oxidative breakdown of one glucose molecule? [answer]

6. Where does chemiosmotic phosphorylation occur? [answer]

7. The electron transport chain pumps what kind of ions into the intermembrane space? [answer]

8. Name the ultimate electron acceptor in aerobic respiration. [answer]

9. Glycolysis depends on a continuous supply of what molecule? [answer]

10. What is the end product of fermentation? [answer]

11. What compound is produced by muscle cells under anaerobic conditions such as might occur during intense exercise? [answer]

12. Describe what happens to a glucose molecule as it goes through the steps of glycolysis, the formation of acetyl CoA, and the Kreb's cycle. Your answer should mention the following:

the name of the compound produced by each step (produced by glycolysis, produced by the formation of acetyl CoA, produced by the Kreb?s cycle.

the number of carbon atoms in each of the compounds listed above.

the number of NADH and ATP formed or consumed in each step and the type of phosphorylation (substrate-level or chemiosmotic)

13. Describe the electron transport system. Your answer should mention the following:

the source of electrons

the eventual electron acceptor

Hydrogen ions (H+)

the type of phosphorylation

the number of ATP produced from each NADH and FADH2