10.2 The Process of Cellular Respiration Quiz

The first stage of cellular respiration is glycolysis, which literally means 'sugar splitting.' When glucose, a 6-carbon sugar, is broken down during glycolysis, what product forms?

• 2 molecules of lactic acid, C3H6O3

• 3 molecules of ethanol, C2H5OH

• 2 molecules of pyruvic acid, C3H4O3

• 6 molecules of carbon dioxide, CO2

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The_______ is the innermost compartment of a ___________.

• matrix, mitochondrion

• stoma, nucleus

• cytoplasm, cell wall

• nucleolus, glycolysis

In the matrix of the mitochodrion, _________ occurs, breaking down ______ acid into carbon dioxide in a series of reactions.

• the Krebs cycle, pyruvic

• glycolysis, lactic

• fermentation, nitric

• NAD+, citric

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Aerobic cellular respiration traps energy in ATP in 3 stages. Look at the figure.

In which stage or set of stages is carbon dioxide released?

• Glycolysis

• Krebs cycle

• Electron transport

• All three stages

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Which two molecules generated by the Krebs cycle pass their high-energy electrons to the electron transport chain? Select two answer choices.

• NADH

• glucose (C₆H₁₂O₆)

• FADH₂

• NAD⁺

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How do high-energy electrons from glycolysis and the Krebs cycle contribute to the formation of ATP from ADP in the electron transport chain?

• High-energy electrons interact with pyruvic acid to create a phosphate bond with ADP, forming ATP.

• High-energy electrons pass through the electron transport chain to supply the needed energy to synthesize ATP from ADP.

• High-energy electrons supply a negative charge which causes the citric acid to oxidize, forming a phosphate group to bond with ADP.

• High-energy electrons increase the temperature of ADP so it readily reacts with a phosphate group to form ATP.

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Together, the stages of cellular respiration break down one molecule of ________ into a total of ___ molecules of ATP. The remaining energy is released as _____.

• glucose, 36, heat

• fatty acids, 4, light

• protein, 12, motion

• lactic acid, 72, light

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