(NEW!) Glycolysis Part 3 4 The Payoff Phase

The video tutorial covers the glycolysis process, focusing on the investment and payoff phases. It explains how ATP is consumed and generated, resulting in a net gain of two ATP and two NADH molecules. The tutorial also details the conversion of glucose to pyruvate, emphasizing the doubling of reactions due to the formation of two G3P molecules from one glucose. The final steps involve the conversion of phosphoenol pyruvate to pyruvate, with the net yield of glycolysis being two ATP and two NADH.

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

• It requires an input of ATP.

• It creates NADH.

• It generates ATP.

• It produces pyruvate.

During glycolysis, what happens to dihydroxyacetone phosphate (DHAP)?

• It is used to produce ATP directly.

• It is excreted from the cell.

• It is converted into G3P.

• It is converted into glucose.

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

• Four

• Three

• Two

• One

What is the role of G3P dehydrogenase in glycolysis?

• It converts glucose to pyruvate.

• It removes hydrogen from G3P to form NADH.

• It adds a phosphate group to glucose.

• It splits glucose into two molecules.

Which molecule is directly responsible for the production of ATP in the payoff phase of glycolysis?

• 1,3-bisphosphoglycerate

• Pyruvate

• G3P

• NADH

What is the significance of phosphoenolpyruvate (PEP) in glycolysis?

• It is an enzyme that catalyzes the conversion of glucose.

• It is a high-energy molecule that donates a phosphate to ADP.

• It is the initial substrate of glycolysis.

• It is the final product of glycolysis.

How many ATP molecules are produced in the conversion of phosphoenolpyruvate to pyruvate?

• Three

• Four

• One

• Two

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

• Four

• Two

• Zero

• One

What is the net production of NADH molecules during glycolysis?

• Four

• Three

• Two

• One

What happens to pyruvate after glycolysis under aerobic conditions?

• It is converted into lactate.

• It enters the mitochondria for further oxidation.

• It is excreted from the cell.

• It is stored as glycogen.