Glycolysis (Part 4 4) Payoff Phase Review

The video tutorial explains glycolysis, focusing on the investment and payoff phases. It details how ATP is consumed and generated, the role of enzymes like G3P dehydrogenase and phosphoglycerate kinase, and the formation of high-energy molecules such as NADH and ATP. The tutorial concludes with the net yield of glycolysis and the transition of pyruvate to the TCA cycle.

What is the primary purpose of the investment phase in glycolysis?

• To produce NADH

• To split glucose into two molecules

• To convert pyruvate to acetyl-CoA

• To generate ATP

What happens to dihydroxyacetone phosphate (DHAP) during glycolysis?

• It is converted to pyruvate

• It is oxidized to form NADH

• It is converted to glyceraldehyde 3-phosphate (G3P)

• It is used to generate ATP

How many glyceraldehyde 3-phosphate (G3P) molecules are produced per glucose molecule in glycolysis?

• One

• Two

• Four

• Three

Which enzyme is responsible for the conversion of G3P to 1,3-bisphosphoglycerate?

• G3P dehydrogenase

• Phosphofructokinase

• Hexokinase

• Pyruvate kinase

What is the net gain of ATP molecules at the end of the payoff phase of glycolysis?

• Six

• Four

• Zero

• Two

What is the role of phosphoglycerate mutase in glycolysis?

• It converts pyruvate to lactate

• It converts ATP to ADP

• It converts glucose to glucose-6-phosphate

• It converts 3-phosphoglycerate to 2-phosphoglycerate

Which molecule is formed by the action of enolase during glycolysis?

• Lactate

• Pyruvate

• Phosphoenolpyruvate (PEP)

• Acetyl-CoA

What is the final product of glycolysis?

• Lactate

• Acetyl-CoA

• Glucose

• Pyruvate

How many NADH molecules are produced per glucose molecule during glycolysis?

• One

• Three

• Four

• Two

What happens to pyruvate after glycolysis?

• It is excreted from the cell

• It is stored as glycogen

• It enters the Krebs cycle

• It is converted to glucose