7 - AEROBIC RESPIRATION (STAGE 1)

Question 1

What is the first stage of aerobic respiration?

Answer 1

Glycolysis

Question 2

What happens in this stage?

Answer 2

Glucose is phosphorylated to produce 2 molecules of pyruvate, 2 molecules of ATP and 2 molecules of NADH.

Question 3

What is the first step of glycolysis and explain it

Answer 3

Glucose is phosphorylated by adding 2 phosphates from 2 molecules of ATP, thus creating 2 molecules of trios phosphate and 2 molecules of ADP

Question 4

What is the second step of glycolysis and explain it

Answer 4

Oxidation, when the triose phosphate is oxidised (looses hydrogen), forming 2 molecules of pyruvate.
Then the NAD collects the hydrogen ions, forming 2 reduced NAD.
4 ATP are produced, but 2 were used up in step 1, so there’s a net gain of 2 ATP