Respiration Review Questions for AP Biology

By — McGraw-Hill Professional
Updated on Oct 24, 2011

Review the following concepts if needed:


Review Questions

  1. Most of the ATP creation during respiration occurs as a result of what driving force?
    1. Electrons moving down a concentration gradient
    2. Electrons moving down the electron transport chain
    3. Protons moving down a concentration gradient
    4. Sodium ions moving down a concentration gradient
    5. Movement of pyruvate from the cytoplasm into the mitochondria
  2. Which of the following processes occurs in both respiration and photosynthesis?
    1. Calvin cycle
    2. Chemiosmosis
    3. Citric acid cycle
    4. Krebs cycle
    5. Glycolysis
  3. What is the cause of the cramps you feel in your muscles during strenuous exercise?
    1. Lactic acid fermentation
    2. Alcohol fermentation
    3. Chemiosmotic coupling
    4. Too much oxygen delivery to the muscles
    5. Oxidative phosphorylation
  4. Which of the following statements is incorrect?
    1. Glycolysis can occur with or without oxygen.
    2. Glycolysis occurs in the mitochondria.
    3. Glycolysis is the first step of both anaerobic and aerobic respiration.
    4. Glycolysis leads to the production of 2 ATP, 2 NADH, and 2 pyruvate.
  5. For questions 5–8, use the following answer choices:

    1. Glycolysis
    2. Krebs cycle
    3. Oxidative phosphorylation
    4. Lactic acid fermentation
    5. Chemiosmosis
  6. This reaction occurs in the matrix of the mitochondria and includes FADH2 among its products.
  7. This reaction is performed to recycle NAD+ needed for efficient respiration.
  8. This process uses the proton gradient created by the movement of electrons to form ATP.
  9. This process includes the reactions that use NADH and FADH2 to produce ATP.
  10. Which of the following molecules can give rise to the most ATP?
    1. NADH
    2. FADH2
    3. Pyruvate
    4. Glucose
  11. Which of the following is a proper representation of the products of a single glucose molecule after it has completed the Krebs cycle?
    1. 10 ATP, 4 NADH, 2 FADH2
    2. 10 NADH, 4 FADH2, 2 ATP
    3. 10 ATP, 4 FADH2, 2 NADH
    4. 10 NADH, 4 ATP, 2 FADH2
    5. 10 NADH, 4 FADH2, 2 ATP

Answers and Explanations

  1. C—This is the concept of chemiosmosis: the coupling of the movement of electrons down the electron transport chain and the formation of ATP via the creation of a proton gradient. The protons are pushed out of the matrix during the passage of electrons down the chain. They soon build up on the other side of the membrane, and are driven back inside because of the difference in concentration. ATP synthase uses the movement of protons to produce ATP.
  2. B—This is an important concept to understand. The AP examiners love this topic!
  3. A—Lactic acid fermentation occurs in human muscle cells when oxygen is not available. Answer choice B would be incorrect because alcohol fermentation occurs in yeast, fungi and some bacteria. During exercise, if your muscle becomes starved for oxygen, it will switch over to fermentation. The pain from the cramp is due to the acidity in the muscle caused by the increased concentration of lactate.
  4. B—Glycolysis occurs in the cytoplasm. All the other statements are correct.
  5. B.
  6. D.
  7. E.
  8. C.
  9. D—Glucose can net 36 ATP, NADH can net 3, FADH2 can net 2, and pyruvate can net 15.
  10. D—During glycolysis, a glucose molecule produces 2 ATP, 2 NADH, and 2 pyruvate. The 2 pyruvate then go on to produce 8 NADH, 2 FADH2, and 2 ATP during the Krebs cycle to give the total listed in answer choice D.
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