7.2.3 - Glycolysis

Question 1

What Is Glycolysis?
(3 Points)

Answer 1

~ First stage of respiration.

~ Does not require glucose.

~ Occurs in the cytoplasm.

Question 2

What Are The Products Of Glycolysis?
(3 Points)

Answer 2

~ 2x pyruvate (3C) molecules, which move into the matrix of the mitochondria to be used during the link reaction.

~ Net gain of 2 ATP.

~ 2x reduced NAD, which used during oxidative phosphorylation.

Question 3

What Happens Under Anaerobic Conditions?

Answer 3

Glycolysis produces lactic acid or lactate, instead of pyruvate.

Question 4

Describe The Steps Of Glycolysis
(2 Points)

Answer 4

~ Phosphorylation of glucose.

~ Oxidation of triose phosphate.

Question 5

Describe The Steps Of The Phosphorylation Of Glucose During Glycolysis
(2 Points)

Answer 5

~ Occurs when 2x molecules of ATP, are required to provide the 2x phosphates needed for the phosphorylation of glucose.

~ Producing 2x molecules of triose phosphate and 2x molecules of ADP.

Question 6

Describe The Steps Of The Oxidation Of Triose Phosphate During Glycolysis
(4 Points)

Answer 6

~ Triose phosphate is oxidised (Loses hydrogen), forming 2x molecules of pyruvate.

~ NAD collects the hydrogen ions, forming 2 reduced NAD.

~ 4 ATP are produced, but 2 were used to phosphorylate glucose.

~ Therefore there is a net gain of 2x ATP molecules.