Carbohydrates 4

Question 1

What are the four bypass steps of gluceogenesis?

Answer 1

The first two convert pyruvate to oxaloacetate then PEP. This occurs in the cytosol.
The third step converts fructose-1,6-bisphosphate to frucotose-6-phosphate.
The fourth step is the final step in gluconeogenesis which dephosphorylates glucose-6-phosphate to glucose.

Question 2

Where does the conversion of glucose-6-phosphate to glucose take place?

Answer 2

In the lumen of the ER.

Question 3

What is the pentose phosphate pathway used for?

Answer 3

The generation of NADPH.

Question 4

What are the two part of the PPP?

Answer 4

The oxidative and irreversible part converts glucose-6-phosphate to pentose phosphate.
The non oxidative and reversible part converts glucose-6-phosphate and pentose Phosphates to different numbered carbon sugars.