Krebs Cycle Quiz

What is the primary purpose of the Krebs Cycle?

• To produce glucose

• To harvest hydrogen molecules

• To generate oxygen

• To break down proteins

What compound is formed when pyruvic acid is converted in the presence of oxygen?

• Ethanol

• Lactic acid

• Acetyl

• Glucose

What role does coenzyme A play in the Krebs Cycle?

• It generates ATP

• It acts as a catalyst

• It breaks down glucose

• It transports acetyl

What happens to the acetyl group when it enters the mitochondria?

• It breaks off and forms a two-carbon structure

• It combines with glucose

• It is converted into ATP

• It forms a three-carbon compound

What is formed when the two-carbon compound combines with a four-carbon compound?

• A seven-carbon compound

• A six-carbon compound

• A three-carbon compound

• A five-carbon compound

What is released when the six-carbon compound breaks down?

• Glucose

• Carbon dioxide

• Water

• Oxygen

Why is oxygen necessary in the Krebs Cycle?

• To generate water

• To combine with carbon to form carbon dioxide

• To form glucose

• To break down proteins

What is the role of NAD in the Krebs Cycle?

• It breaks down glucose

• It carries hydrogen atoms

• It generates ATP

• It forms carbon dioxide

What does the term 'decarboxylase' refer to?

• The formation of ATP

• The addition of glucose

• The removal of carbon and oxygen

• The removal of hydrogen

What is the final product of oxidative phosphorylation?

• 32 ATP molecules

• Water

• Carbon dioxide

• Glucose