Chapter 26 - PPP

Question 1

The pentose phosphate pathway produces…

Answer 1

NADPH, ribose 5-phosphate, and provides an entry point for dietary pentose sugars

Question 2

NADPH

Answer 2

source of biosynthetic reducing power of fatty acids, steroid, etc.

Question 3

first phase of PPP

Answer 3

oxidative generation of NADPH; 3irreversible rxns

Question 4

second phase of PPP

Answer 4

nonoxidative interconversion of a variety of sugars; 5 reversible rxns

Question 5

fatty acid synthesis in..

Answer 5

liver, adipose tissues, and mammary glands

Question 6

steroid synthesis in…

Answer 6

adrenal gland, testes, and ovaries

Question 7

rate-limiting step of PPP

Answer 7

first reaction; G6P by glucose 6-phosphate dehydrogenase

Question 8

rate limiting step is controlled by..

Answer 8

level of NADP+

Question 9

four distinct modes of the PPP

Answer 9

• mainly ribose 5-P is needed
• both NADPH and ribose 5-P are required
• mainly NADPH is needed
• NADPH and ATP are required