3.6-7: Glycolysis

Question 1

What is the starting point of cellular respiration? Where does it occur?

Answer 1

• Glycolysis

- cytosol

Question 2

What does glycolysis split glucose into? Btw glucose has 6 carbons, so remember to answer in terms of carbons

Answer 2

• splits glucose (6C) into 2 pyruates (3C)

Question 3

What are the two stages of glycolysis?

Answer 3

1. Energy investment stage

2. Energy payoff stage

Question 4

What occurs in the energy investment stage?

Answer 4

• The cell uses ATP to phosphorylate compounds of glucose

- aka adds phosphate to glucose to activate

Question 5

What occurs in the energy payoff stage?

Answer 5

• energy is produced by substrate level phosphorylation

Question 6

In the energy pay off stage, what does the net energy yield per one glucose?

Answer 6

• 2 ATP

- 2 NADH

Question 7

What is the reaction for the energy investment stage?

Answer 7

2 ATP —> 2 ADP + P (energy of activation)

Note that its kind of like paying 2 ATP to activate glucose

Question 8

What is the reaction for the energy pay off stage? There is two I think

Answer 8

4 ADP + P —> 4ATp

2 NAD+ + 4e + 4H+ —> 2NADH + 2H+ (the products r 2NADH essentially)

Question 9

What are the net products in glycolysis?

Answer 9

• 2 pyruvates and 2 water
• 2 ATP (2 in, made 4)
• 2 NADH + 2H+