Biology Unit 3: Cell Energy

What are the reactants of cellular respiration?

• glucose & carbon dioxide
• glucose & oxygen
• water & oxygen
• water & carbon dioxide

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The purpose of cellular respiration is to 

• make water
• make ATP
• make glucose
• make  oxygen

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If oxygen is not present what process will occur in yeast cells?

• Alcoholic fermentation
• Respiration
• Photosynthesis
• Lactic acid fermentation

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During fermentation, yeast produces CO₂ and

• lactic acid
• alcohol
• hydrogen 
• water

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Which of these is a product of cellular respiration?

• ATP

• Carbon dioxide

• Water

• All of these are a product of cellular respiration

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Which process produces the most ATP per molecule of glucose?

• lactic acid fermentation
• aerobic respiration
• alcoholic fermentation
• all are about the same

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When a phosphate group is removed from an ATP molecule, 

• a substantial amount of energy is released
• an enzyme is formed
• energy is stored
• activation energy is increased

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In the presence of oxygen, cellular respiration takes place in two stages. They are

• glycolysis and fermentation
• electron transport chain, then fermentation
• glycolysis, then aerobic respiration
• glycolysis, then the Calvin cycle

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The process of cellular respiration 

• is performed only by organisms that are incapable of photosynthesis
• is performed by autotrophs and heterotrophs
• occurs before plants are able to carry out photosynthesis
• occurs only in animals

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Cells produce ATP most efficiently in the presence of

• water
• carbon dioxide
• oxygen
• radiant energy

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