please answer 1-6 :)

1. Choose the CORRECT enzyme–substrate pair from thepentose phosphate pathway.

a. transaldolase – xylulose 5-phosphate

b. glucose 6-phosphate dehydrogenase –6-phosphoglucono-δ-lactone

c. 6-phosphogluconate dehydrogenase –6-phosphoglucono-δ-lactone

d. transketolase – xylulose 5-phosphate

e. lactonase – ribulose 5-phosphate

2. Choose the enzymes that catalyze reactions with concomitantformation of NADPH.

a. glucose 6-phosphate dehydrogenase and lactonase

b. transketolase and transaldolase

c. phosphofructokinase and 6-phosphogluconate dehydrogenase

d. glucose 6-phosphate dehydrogenase and 6-phosphogluconatedehydrogenase

e. phosphopentose epimerase and glucose 6-phosphatedehydrogenase

3. Glucose 6-phosphate dehydrogenase is highly specificfor:

a. NADH.

b. NADP+.

c. ADP.

d. NAD+.

e. NADPH.

4. In what tissues is the pentose phosphate pathway active?Select all that apply.

a. pancreas

b. liver

c. red blood cells

d. mammary gland

e. muscle

5. When both NADPH and ATP are required, theintermediates from the pentose phosphate pathway:

enter glycolysis.

restore glucose 6-phosphate by entering the oxidativephase of the pentose phosphate pathway.

enter gluconeogenesis.

restore glucose 6-phosphate by entering the nonoxidativephase of the pentose phosphate pathway.

enter the citric acid cycle.

6. What are the concomitant products of the conversion ofglucose 6-phosphate to pyruvate in mode 4 of the pentose phosphatepathway? Select all that apply.

NADPH

CO2

ADP

ATP

NADH