AP Cell Respiration

Which process is the largest contributor to the release of CO₂ 

• Citric Acid Cycle or Krebs Cycle
• Pyruvate Oxidation
• Glycolysis
• Oxidative Phosphorylation 

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Which process produces the least amount of ATP in cells?

• Glycolysis

• Citric Acid cycle

• Lactic acid Fermentation

• The Prep Step

What is the main job of the electron carriers in cellular respiration? 

• Transport electrons and hydrogen atoms to the electron transport chain 
• Capture energy throughout the process of cellular respiration
• Provide the reactants for the process of cellular respiration
• Pump positive hydrogen ions and shuttle electrons across the electron transport chain and contribute to chemiosmosis

Which of the following is not an end product of the Kreb's cycle?

• NADH

• CO₂

• pyruvate

• ATP

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Where does glycolysis occur?

• mitochondrial matrix
• cytoplasm
• inner membrane of mitochondria
• outer membrane of mitochondria

What is the correct equation for cellular respiration?

• 6O₂ + C₆H₁₂O₆ -> 6CO₂ + 6H₂O + Energy
• 6O₂ + C₆H₁₂O₆ + Energy -> 6CO₂ + 6H₂O
• 6CO₂ + 6H₂O -> 6O₂ + C₆H₁₂O₆ + Energy
• 6CO₂ + 6H₂O + Energy -> 6O₂ + C₆H₁₂O₆

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A weightlifter is using heavy weights in short bursts for a competition. Because his muscle cells are not able to take in enough oxygen to make very much ATP the weightlifter begins to get fatigue in his muscles. Which of the following processes is most likely going on in the muscles of the weightlifter as he competes in his event?

• As the cells run out of oxygen they switch to anaerobic respiration (fermentation), which allows the cell to make small amounts of ATP in the absence of oxygen.

• As the cells run out of oxygen, they die off gradually and the weightlifter's muscles have fewer contracting muscle cells.

• The cells will never run out of oxygen if the weightlifter is breathing.

• As the cells run out of oxygen, they will continue to make the same amount of ATP, since oxygen is not required to make ATP.

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What are the products for the first step of Cell Respiration? (what comes out of step #1)

• Pyruvate, NADH, and 2 ATP

• CO2, NADH, FADH, and 2 ATP

• H2O and 34 ATP

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The ETC provides the energy needed to make the majority of the cell's ATP in a process known as:

• chemiosmosis

• substrate level phosphorylation

• oxidative phosphorylation

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Which of the following statements are false?

• Glycolysis can occur with or without oxygen
• Glycolysis is the first step in both anaerobic and aerobic respiration
• Glycolysis occurs in the mitochondria
• Glycolysis produces 2 ATP, 2 Pyruvates, and 2 NADH

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