Pentose Phosphate Pathway: Reversible Portion

Question 1

What is the purpose of the PPP (reversible) for the Liver only

Answer 1

Uses Ribose 5P for nucleotide synthesis

Question 2

What is the rxn of the PPP (reversible) for the Liver only

Answer 2

Ribulose 5P + Ribulose 5P —> Xylulose 5P + Ribose 5P

Question 3

What are the nucleotides in the Liver only

Answer 3

ATP, GTP, CTP, TTP, UTP, NAD+, FAD, NADP+

Question 4

What is the purpose of the PPP (reversible) for RBC

Answer 4

Fructose 6P and Glyceraldehyde 3P to renter glycolysis

Question 5

In RBC:
Finish the rxn: Ribulose 5P + Ribulose 5P —>

Answer 5

Xylulose 5P + Ribose 5P (epimerase and isomerase)

Question 6

In RBC:
Finish the rxn: Xylyulose 5P + Ribose 5P —->

Answer 6

Glyceraldehyde 3P + Sedoheptulose 7P (Transketolase)

Question 7

In RBC:
Finish the rxn: Glyceraldehyde 3P + Sedoheptulose 7P —->

Answer 7

Fructose 6P + Erythrose 4P (transaldolase)

Question 8

In RBC:
Finish the rxn: Erythrose 4P + Ribulose 5P —–>

Answer 8

Glyceraldehyde 3P + Fructose 6P

Question 9

What rxn re-enters glycolysis

Answer 9

Glyceraldehyde 3P + Fructose 6P

Question 10

What are the pentose sugars found in the RBC and what type of enzyme do they require?

Answer 10

Erythrose 4P
Xlylulose 5P
Sedoheptulose 7P

Transaldolase