Cellular Respiration Quiz

What is cellular respiration?

• The process by which organisms combine carbon dioxide with water

• The process by which organisms combine oxygen with food molecules

• The process by which organisms convert water into energy

• The process by which organisms degrade food molecules without oxygen

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Which organelle is primarily responsible for cellular respiration in eukaryotic cells?

• Ribosome

• Chloroplast

• Golgi Apparatus

• Mitochondria

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In cellular respiration, what is the main purpose of the degradation of foodstuffs?

• To give off heat

• To convert energy into adenosine triphosphate (ATP)

• To produce water and carbon dioxide

• To store energy as glucose

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How many mitochondria can a liver cell have approximately?

• 100

• 1,000

• 10,000

• 100,000

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What are the three main metabolic stages of cellular respiration?

• Photosynthesis, Glycolysis, and Oxidative Phosphorylation

• Glycolysis, The TCA Cycle (Krebs), and Oxidative Phosphorylation (Electron Transport Chain)

• The TCA Cycle, Fermentation, and Glycolysis

• Fermentation, Photosynthesis, and The TCA Cycle

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During glycolysis, what molecule is glucose initially broken down into?

• Carbon dioxide and water

• NADH

• Pyruvate

• ATP

What compound do pyruvate molecules convert into before entering the TCA cycle (Krebs Cycle)?

• Glucose

• Acetyl coenzyme A

• NADH

• FADH2

Which process directly follows the TCA/Krebs cycle in cellular respiration?

• Photosynthesis

• Glycolysis

• Oxidative phosphorylation

• Fermentation

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What is the main outcome of oxidative phosphorylation?

• Production of NADH

• Conversion of pyruvate to acetyl coenzyme A

• Reduction of oxygen atoms to form water

• Synthesis of glucose

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How many ATP molecules are produced from the transfer of one pair of electrons to oxygen during oxidative phosphorylation?

• One

• Two

• Three

• Four

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