Chapter 8

Front 1

both glycogenesis and glycogenolysis are controlled primarily by the interplay between the two hormones insulin and ______

Back 1

glucagon

Front 2

hexokinase D is found in the

Back 2

liver

Front 3

an enzyme family called the ____ catalyzes the phosphorylation of hexoses in the body

Back 3

hexokinases

Front 4

the conversion if glucose 1-phosphate to UDP-glucose has the delta G naught prime near zero. which of the following reactions is coupled with the above reaction to drive it to completion

Back 4

hydrolysis of PPi

Front 5

which of the following is required for the conversion of UDP-glucose to glycogen

Back 5

Glycogen synthase and branching enzyme

both A and B

Front 6

a glycogen molecule that has been degraded to its branch points is called

Back 6

limit dextrin

Front 7

regulation of glycolysis involves all of the following except

Back 7

none of the above

Front 8

the building of insulin receptors on the surface of muscle cells stimulates which of the following processes

Back 8

glycogenesis

Front 9

under stressful conditions, epinepherine is released from the adrenal medulla. the release of epinephrine has which of the following effects

Back 9

all of the above

Front 10

phosphorylase kinase

Back 10

converts inactive phosphorylase to active phosphrylase

Front 11

cori's disease is caused by

Back 11

a deficiency of debranching enzyme

Front 12

which of the following activates phosphoprotien phosphatase

Back 12

insulin

Front 13

glucose-6-phosphate is a substrate in which of the following processes

Back 13

gluconeogenesis and glycolysis

both A and B

Front 14

Fructose-2-6-bisphosphate

Back 14

is an indicator of high cellular glucose concentration

Front 15

the embden-myehof pathway is also refered to as

Back 15

glycolysis

Front 16

in glycolysis, net____ moles of ATP are produced per mole of glucose consumed

Back 16

2

Front 17

in glycolysis____moles of NADH are produced per mole of glucose consumed

Back 17

2

Front 18

the presense of which of the following molecules indicates that the cell has sufficient energy reserves

Back 18

ATP and citrate

both A and B

Front 19

which of the following enymes is an oxidoreductase

Back 19

glyceraldehyde-3-phosphate dehydrogenase

Front 20

the first reaction in the oxidative phase of the pentose phosphate pathway is catalyzed by

Back 20

glucose-6-phosphate dehydrogenase

Front 21

which of the following enzymes catalyze an irreversible process

Back 21

pyruvate kinase

Front 22

in anaerobic organisms pyruvate is used to regenerate cellular

Back 22

NAD+

Front 23

allosteric regulation of which of the following enzymes is important in the regulation of glycolysis

Back 23

all of the above

Front 24

gluconeogenesis occurs primarily in the

Back 24

liver

Front 25

which of the following molecules can be used to synthesize glucose via gluconeogenesis

Back 25

all of the above

Front 26

which of the following is the most important glucogenic amino acid

Back 26

alanine

Front 27

gluconeogenesis is stimulated by high concentrations of which of the following compounds

Back 27

all of the above

Front 28

which of the following is an oxidizing agent in fermentation

Back 28

pyruvate

Front 29

in addition to glucose, which of the following sugars are important in the human diet

Back 29

sucrose

Front 30

intermediates in the monoxidative phase of the pentose phosphate pathway incluse all of the following except

Back 30

dihydroxyacetone phosphate

Front 31

the use of highly exergonic reactions in the begining of a catabolic pathway is referred to as

Back 31

turbo design

Front 32

aldol cleavage of which of the following sugar will produce one mole each of dihydroxyacetone and glyceraldehyde

Back 32

fructose

Front 33

which of the following is a second messenger in glycogenolysis

Back 33

cAMP

Front 34

in animals excess glucose is converted into its storage form

Back 34

glycogen

Front 35

the major carbohydrate fuel for ost organisms is

Back 35

glucose

Front 36

which of the following enzymes is not required in gluconeogenesis

Back 36

phosphofructokinase

Front 37

the final product of glycolysis is

Back 37

pyruvate

Front 38

the principle products of the pentose phosphate pathway include

Back 38

NADPH and Ribose-5-phosphate

both B and D

Front 39

flux of which of the following sugars into the glycolutic pathway is essentially unregulated

Back 39

fructose

Front 40

conversion of fructose-6-phosphate to fructose-1,6- bisphosphate has two purposese. one is the commitment of the molecule to glycolysis, the second is

Back 40

preventing the cleavage products of the next step from diffusing out of the cell

Front 41

which of folowing enzymes will catalyze the first commitment step in glycolysis

Back 41

phosphofructokinase

Front 42

the crabtree effect in yeast is

Back 42

repression of aerobic metabolism of glucose

Front 43

the pasteur effect is

Back 43

repression of glycolysis by oxygen

Front 44

the diauxic shift is

Back 44

a significant change in gene expression

Front 45

the phosphorolation of glucose when it enters a cell accomplishes which of the following

Back 45

prevents back diffusion out of the cell and activates the glucose for further reaction

both B and D

Front 46

which of the following compounds is an end products of anerobic respiration

Back 46

ethanol