(NEW!) Glycolysis Part 3 4 The Payoff Phase

The video tutorial covers glycolysis, focusing on the investment and payoff phases. Initially, ATP is consumed to convert glucose into G3P molecules. The payoff phase generates ATP and NADH, resulting in a net gain of two ATP and two NADH per glucose molecule. The tutorial explains the biochemical reactions involved, emphasizing the doubling effect due to two G3P molecules per glucose. The final product, pyruvate, is prepared for further oxidation in the mitochondria.

What is the primary reason the first phase of glycolysis is called the 'investment phase'?

• It generates ATP.

• It requires the use of ATP.

• It produces pyruvate.

• It involves the Krebs cycle.

How many G3P molecules are produced from one glucose molecule during glycolysis?

• One

• Two

• Three

• Four

What is the main purpose of the payoff phase in glycolysis?

• To produce glucose

• To initiate the Krebs cycle

• To consume ATP

• To generate ATP and NADH

Which enzyme is responsible for converting G3P into 1,3-bisphosphoglycerate?

• Enolase

• Pyruvate kinase

• G3P dehydrogenase

• Phosphoglycerate kinase

How many ATP molecules are produced from the conversion of 1,3-bisphosphoglycerate to 3-phosphoglycerate?

• One

• Two

• Four

• Three

What is the role of enolase in glycolysis?

• It converts G3P to 1,3-bisphosphoglycerate.

• It forms phosphoenolpyruvate.

• It generates ATP from ADP.

• It oxidizes NADH.

Which molecule is the final product of glycolysis?

• G3P

• Acetyl-CoA

• Glucose

• Pyruvate

How many net ATP molecules are produced per glucose molecule during glycolysis?

• One

• Two

• Three

• Four

What is the net yield of NADH molecules from glycolysis per glucose molecule?

• One

• Four

• Two

• Three

What happens to pyruvate after glycolysis under aerobic conditions?

• It is excreted from the cell.

• It is stored as glycogen.

• It enters the Krebs cycle.

• It is converted to lactate.