Chapter 13: Bioenergetics and Reactions

Question 1

Catabolism

Answer 1

Energy producing, breakdown

Question 2

Anabolism

Answer 2

Energy consuming, biosynthetic

Question 3

Delta G’0

Answer 3

Biochemical standard state= pH 7, [H2O] = 55M

Question 4

Delta G

Answer 4

determines the direction in cells

Question 5

Hydrolysis reactions

Answer 5

Tends to be strongly favorable (spontaneous), water is consumed

Question 6

Isomerization reactions

Answer 6

Have smaller free energy changes

Question 7

True or False:

Molecular oxygen takes one electron at a time

Answer 7

True

Question 8

A rare homolytic reaction

Answer 8

Vitamin B12

Question 9

Phosphoryl transfer

Answer 9

Used to activate metabolites or for signal transduction

Question 10

High energy compounds. Molecules that carry energy state higher than ATP. Transfer their phosphate to ADP to make ATP.

Answer 10

1,3-Bisphosphoglycerate,

Phosphoenolpyruvate and Phosphocreatin

Question 11

True or False:

Hydrolysis of thioesters is strongly favorable

Answer 11

True

Question 12

ATP hydrolysis has a positive or negative delta G?

Answer 12

Negative delta G

Question 13

True or False:

ADP has a greater entropy and solvation than ATP

Answer 13

True

Question 14

Reduction potential (E)

Answer 14

Affinity for electrons; higher E, higher affinity

Question 15

For negative delta G, is a positive or negative delta E needed?

Answer 15

Positive delta E

Question 16

low NADP

high NADPH

Answer 16

Anabolic reaction

Question 17

low NADH

high NAD

Answer 17

Catabolic reaction

Question 18

NAD and NADP can or cannot dissociate from enzyme after reaction

Answer 18

Can

Question 19

NADH generally involved in ________ reaction

Answer 19

catabolic

Question 20

NADPH is an activated carrier with high energy bonds, involved generally in
________ reactions

Answer 20

anabolic