Cellular Respiration

What is the primary purpose of cellular respiration?

• To produce sunlight

• To release energy from food molecules

• To create water in cells

• To absorb nutrients from the environment

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Where does cellular respiration primarily occur in eukaryotic cells?

• Nucleus

• Mitochondria

• Endoplasmic reticulum
• Cytoplasm

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Which molecule is commonly used as a source of energy for cellular respiration?

• Oxygen

• Carbon dioxide

• Glucose

• Water

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______ _______ is the main waste product of cellular respiration in animals.

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What is the first stage of cellular respiration?

• Krebs cycle

• Electron transport chain

• Glycolysis

• Fermentation

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Which type of respiration occurs in the absence of oxygen?

• Aerobic respiration

• Anaerobic respiration

• External respiration

• Internal respiration

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Which organisms perform cellular respiration?

• Only plants

• Only animals
• Only fungi

• All living organisms

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________ is the end product of glycolysis.

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During which phase of cellular respiration is carbon dioxide produced?

• Glycolysis

• Krebs cycle

• Electron transport chain

• Fermentation

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What role does oxygen play in the electron transport chain?

• It acts as the final electron acceptor

• It donates electrons at the beginning of the chain

• It produces ATP directly

• It splits glucose molecules

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