KREBS CYCLE

What is the main function of the Krebs cycle?

• To generate ATP for the cell

• To produce proteins for the cell

• To store energy for the cell

• To transport substances within the cell

How many ATP molecules are produced during the Krebs cycle?

• 2 ATP

• 4 ATP

• 6 ATP

• 8 ATP

What is the name of the enzyme that begins the Krebs cycle?

• Pyruvate dehydrogenase

• Acetyl-CoA synthase

• Citrate synthase

• Malate dehydrogenase

What is the main purpose of the Krebs cycle in animal cells?

• To produce energy

• To produce glucose

• To produce oxygen

• To produce amino acids

Which of the following is NOT an enzyme involved in the Krebs cycle?

• Isocitrate dehydrogenase

• Pyruvate dehydrogenase

• Fumarase

• Succinate dehydrogenase

The Krebs cycle takes place in which of the following organelles?

• Mitochondria

• Ribosomes

• Nucleus

• Endoplasmic reticulum

The Krebs cycle is also known as what?

• The citric acid cycle chain

• The glycolysis pathway

• The oxidative phosphorylation pathway

• The electron transport

How many carbon atoms does each molecule of acetyl-CoA contain?

• 1

• 2

• 3

• 4

What is the main role of the enzyme aconitase in the Krebs cycle?

• To convert isocitrate to alpha-ketoglutarate to succinate

• To convert succinyl-CoA

• To convert alpha-ketoglutarate to succinyl-CoA

• To convert citrate to isocitrate

What is the main role of the enzyme citrate synthase in the Krebs cycle?

• a) To convert pyruvate to acetyl-CoA

• b) To convert acetyl-CoA to citrate

• c) To convert citrate to isocitrate

• d) To convert isocitrate to alpha-ketoglutarate