Quiz on Respiration and Energy

During which stage of cellular respiration is carbon dioxide produced?

• Glycolysis

• Krebs cycle

• Electron transport chain

• Fermentation

Which process occurs in the absence of oxygen and produces ethanol in plants?

• Glycolysis

• Krebs cycle

• Fermentation

• Electron transport chain

Which of the following is a product of anaerobic respiration in animals?

• Lactic acid

• Ethanol

• Carbon dioxide

• Oxygen

Which process produces the most ATP molecules per glucose molecule?

• Aerobic respiration

• Anaerobic respiration

• Glycolysis

• Krebs cycle

Which step in cellular respiration produces the most NADH molecules?

• Glycolysis

• Krebs cycle

• Electron transport chain

• Fermentation

What is the primary function of ATP in cells?

• Energy storage

• Energy transfer

• Structural support

• Waste removal

Which molecule is the initial substrate for the Krebs cycle?

• Pyruvate

• Glucose

• Acetyl-CoA

• ATP

In which organelle does the majority of ATP production occur in eukaryotic cells?

• Nucleus

• Mitochondria

• Golgi apparatus

• Endoplasmic reticulum

What is the net gain of ATP molecules produced during glycolysis?

• 2

• 4

• 6

• 8

Which molecule is the final electron acceptor in the electron transport chain?

• Oxygen

• Carbon dioxide

• Water

• Glucose