Glycolysis and Krebs Cycle Quiz

The video explains the breakdown of glucose into pyruvate during glycolysis, followed by the conversion of pyruvate into acetyl CoA. Acetyl CoA enters the Krebs cycle, where carbon dioxide and NADH are produced. The cycle involves transformations of carbon compounds, hydrogen transfer, and the production of ATP. The cycle regenerates the initial carbon molecule, completing two circuits for each glucose molecule.

What is the end product of glycolysis?

• ATP

• NADH

• Pyruvate

• Acetyl CoA

During the conversion of pyruvate to acetyl CoA, which molecule is produced?

• ATP

• Glucose

• NADH

• FADH2

What happens to the acetyl CoA when it enters the Krebs cycle?

• It forms a four-carbon compound

• It is converted to glucose

• It combines with a four-carbon molecule

• It releases ATP

What is released from the six-carbon compound in the Krebs cycle?

• Water

• Oxygen

• Carbon dioxide

• Glucose

Which molecule is formed when hydrogen is transferred to NAD+?

• CO2

• FADH2

• NADH

• ATP

What is produced during the second oxidation and decarboxylation in the Krebs cycle?

• Water

• Glucose

• FADH2

• ATP

What is regenerated at the end of the Krebs cycle?

• Acetyl CoA

• Pyruvate

• Four-carbon molecule

• Six-carbon compound

How many circuits of the Krebs cycle are completed for each glucose molecule?

• Two

• Four

• One

• Three

Which molecules are formed during the further oxidation of the four-carbon molecule?

• NADH and FADH2

• ATP and CO2

• Glucose and water

• Pyruvate and acetyl CoA