Krebs Cycle Quiz

What is the other name of Krebs cycle?

• Citric acid cycle

• Citric acid cascade

• Citric acid pathway

• Citric acid process

Where does the Krebs cycle occur?

• Cytoplasm

• Lysosomes

• Mitochondria

• Nucleus

What is the starting molecule of the Krebs cycle?

• Acetyl-CoA

• Citric acid

• Oxaloacetate

• Pyruvate

What is the primary function of the Krebs cycle?

• To produce ATP

• To break down glucose

• To synthesize proteins

• To store energy

What are the main products of the Krebs cycle?

• ATP, NADH, and FADH2

• ATP, CO2, and H2O

• Glucose, CO2, and H2O

• Lactic acid, CO2, and H2O

Which coenzymes are reduced during the Krebs cycle?

• NAD+ and FAD

• ATP and ADP

• Acetyl-CoA and CoA-SH

• Oxaloacetate and citrate

How many ATP molecules are directly produced by the Krebs cycle for each molecule of glucose oxidized?

• 2

• 4

• 36

• 38

What is the role of NADH and FADH2 in the Krebs cycle?

• They store energy in the form of high-energy electrons.

• They act as catalysts for the reactions.

• They provide the starting material for the cycle.

• They transport oxygen to the mitochondria.

How is the Krebs cycle regulated?

• By the availability of oxygen

• By the concentration of ADP

• By the activity of key enzymes

• All of the above

What is the significance of the conversion of pyruvate to acetyl-CoA?

• It links glycolysis to the Krebs cycle.

• It produces ATP directly.

• It regenerates NADH.

• It occurs in the cytoplasm.