Glycolysis: Names in the steps

Question 1

First step of glycolysis? Enzyme involved?

Answer 1

Glucose –> Glucose 6 phosphate

hexokinase

Question 2

glucose 6 phosphate —> ?

enzyme?

Answer 2

fructose 6 phosphate

phosphohexose isomerase

Question 3

fructose 6 phosphate —> ?

enzyme?

Answer 3

fructose 1,6 phosphate

phosphofructokinase 1

Question 4

fructose 1,6 phosphate —> ?

enzyme?

Answer 4

2 products:
Dihydroxyacetone phosphate
Glyceraldehyde 3 phosphate

both via aldolase

Question 5

Dihydroxyacetone phosphate —> ?

enzyme?

Answer 5

Glyceraldehyde 3 phosphate

triose phosphate somerase

Question 6

Glyceraldehyde 3 phosphate —> ?

enzyme?

Answer 6

1,3 bisphosphoglycerate

glyceraldehyde phosphate dehydrogenase

Question 7

1,3 bisphosphoglycerate —> ?

enzyme?

Answer 7

3 phosphoglycerate

phosphoglycerate kinase

Question 8

3 phosphoglycerate —> ?

enzyme?

Answer 8

2 phosphoglycerate

phosphoglycerate mutase

Question 9

2 phosphoglycerate —> ?

enzyme?

Answer 9

phosphoenol pyruvate

enolase

Question 10

phosphoenol pyruvate —> ?

enzyme?

Answer 10

pyruvate

pyruvate kinase

Question 11

how many molecules of pyruvate do you get from 1 glucose molecule

Answer 11

2 pyruvate molecules

Question 12

which steps of glycolysis take ATP?

Answer 12

step 1: glucose -> glu 6 phos

step 3: fructose 6 phos -> fructose 1,6 phos

Question 13

which steps produce ATP?

Answer 13

1,3 bisphosphoglycerate -> 3 phosphoglycerate (x2)

phosphoenol pyruvate -> pyruvate (x2)

note: there are two molecules of these steps so in total, 4 ATP is prduced (2 net atp)