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bchm II quiz 1

Total questions: 37

Worksheet time: 19mins

Name
Class
Date
1.

the digestion of dietary carbohydrates always yields ____.

a)

polysaccharides

b)

glucose

c)

monosaccharides

d)

disaccharides

2.

in order to complete the glycolytic process under anaerobic conditions, pyruvate must be _____ so that the pathway can produce the metabolite ____.

a)

oxidized to lactate -- NADH

b)

reduced to lactate -- NADH

c)

oxidized to lactate -- NAD+

d)

reduced to lactate -- NAD+

3.

which of the following glycolytic components has a sufficiently energetic free energy of hydrolysis to provide the work potential needed to produce ATP?

a)

lactate

b)

F-1,6-P

c)

1,3 bisphosphoglycerate

d)

pyruvate

4.

which of the following reactions is catalyzed by the enzyme phosphofructokinase?

a)

F-6-P --> F-1,6-P

b)

pyruvate --> lactate

c)

1,3 BPG --> 3-phosphoglycerate

d)

G-6-P --> F-6-P

5.

complete the reaction: ADP + ___ ---> ATP + ___

a)

ATP -- AMP

b)

ADP --AMP

c)

AMP -- ADP

d)

AMP -- ATP

6.

which of the following sets of anatomical sites supports the reactions that accomplish the digestion of starch?

a)

mouth and stomach

b)

mouth and intestinal lumen

c)

intestinal lumen and liver

d)

stomach and pancreas

7.

the agent NAD+ is formed by the glycolytic pathway as ____.

a)

pyruvate is reduced to lactate

b)

lactate is oxidized to pyruvate

c)

pyruvate is oxidized to lactate

d)

lactate is reduced to pyruvate

8.

how many mM of ATP would be produced as four mM of G-3-P are converted to lactate by the second stage of glycolysis?

a)

2

b)

12

c)

4

d)

8

9.

the portion of the glycolytic pathway that starts with G-6-P and ends with lactate will produce ___ mM of lactate and ___ mM of ATP (net) per mM of G-6-P used.

a)

2 -- 4

b)

2 -- 3

c)

1 -- 2

d)

2 -- 2

10.

the pentose pathway is responsible for the production of the carbohydrate ____, that is used in polynucleotide formation, and the coenzyme ___.

a)

ribose -- NADPH

b)

fructose -- NAD+

c)

glucose -- NADPH

d)

fructose-6-P -- NADP+

11.

the absorption of glucose from the intestinal lumen into the intestinal mucosal cells requires the concomitant absorption of ___ from the intestinal lumen to the intestinal mucosal cells.

a)

Fe3+

b)

Ca2+

c)

K+

d)

Na+

12.

the first stage of glycolysis starts with glucose, ends with ____, and consumes ___ mM of ATP per mM of glucose.

a)

lactate -- 4

b)

dihydroxyacetone-P -- 2

c)

G-6-P -- 2

d)

lactate -- 2

13.

which of the following sets of sugars does not need to be digested before they are absorbed from the intestinal lumen?

a)

ribose & lactose

b)

sucrose & honey

c)

galactose & fructose

d)

honey & lactose

14.

the conversion of four moles of fructose-6-P to lactate via the glycolytic pathway will net ___ moles of ATP.

a)

12

b)

16

c)

8

d)

3

15.

complete the reaction: ___ + ADP ---> ___ + ATP

a)

pyruvate -- lactate

b)

lactate -- pyruvate

c)

phosphoenolpyruvate -- pyruvate

d)

glucose -- G-6-P

16.

pyruvate must be ____ before it can be made into lactate.

a)

reduced

b)

oxidized

c)

phosphorylated

d)

isomerized

17.

according to the phosphogluconate pathway, ____ is (are) used to convert one mole of glucose-6-phosphate into one mole of ribulose-5-phosphate

a)

two moles of F-6-P

b)

one mole of carbon dioxide

c)

two moles of NAD+

d)

two moles of NADP+

18.

the digestion of lactose involves the ___.

a)

oxidation of galactose

b)

reduction of glucose

c)

hydrolysis of a β\beta  1-4 linkage

d)

hydrolysis of a α\alpha  1-4 linkage

19.

the glycolytic pathway occurs completely in the cellular ___ and ATP production is accomplished by ___.

a)

cytosol -- substrate-level phosphorylation

b)

mitochondrion -- oxidative phosphorylation

c)

mitochondrion -- substrate-level phosphorylation

d)

cytosol -- oxidative phosphorylation

20.

under anaerobic conditions, the glycolytic pathway ends with the formation of the agent ____.

a)

pyruvate

b)

phosphoenolpyruvate

c)

lactate

d)

F-6-P

21.

how many mM of ATP are produced by the segment of the glycolytic pathway starting with 4 mM of F-6-P and ending with pyruvate? (note: assume anaerobic conditions)

a)

8

b)

16

c)

4

d)

12

22.

which of the following dietary carbohydrates is a simple sugar?

a)

starch

b)

sucrose

c)

fructose

d)

amylose

23.

when glycolysis is performed in the absence of oxygen, the final metabolite in the pathway is ___.

a)

lactate

b)

pyruvate

c)

F-6-P

d)

G-3-P

24.

which of the following simple sugars is found in the glycolytic pathway and the pentose phosphate pathway?

a)

dihydroxyacetone-P

b)

galactose

c)

F-6-P

d)

phosphoenolpyruvate

25.

under aerobic conditions, the glycolytic pathway ends with the formation of the agent ____.

a)

pyruvate

b)

lactate

c)

F-6-P

d)

1,3 bisphosphoglycerate

26.

the activity of the enzyme PFK-1 is increased as the concentration of ____.

a)

ATP increases

b)

Pi increases

c)

ADP decreases

d)

AMP increases

27.

the oxidation of G-6-P by the pentose phosphate pathway results in the formation of ___.

a)

NADP+ and CO2

b)

CO2 and ribulose-5-P

c)

ribose-5-P and 1,3-BPG

d)

NADPH and pyruvate

28.

which of the following sets of metabolites has a sufficiently large free energy of hydrolysis that each of them can power the reaction: ADP + Pi ---> ATP + H2O during glycolysis?

a)

F-6-P and G-6-P

b)

G-6-P and glyceraldehyde-3-P

c)

1,3-BPG and PEP

d)

1,3-BPG and 2,3-BPG

29.

what is the net ATP production from the portion of the glycolytic pathway from F-6-P to lactate starting with one mM of F-6-P? (note: answers are in mM of ATP)

a)

1

b)

2

c)

3

d)

4

30.

which of the following is a summary of the first stage of glycolysis?

a)

glucose ---> DHAP

b)

lactate ---> pyruvate

c)

G-3-P ---> PEP

d)

G-6-P ---> F-1,6-P

31.

which of the following carbohydrates does not need to be digested?

a)

amylose

b)

sucrose

c)

HFCS

d)

starch

32.

the glycolytic reaction that converts NADH to NAD+ is ____.

a)

PEP ---> pyruvate

b)

pyruvate ---> lactate

c)

1,3-BPG ---> 3-phosphoglycerate

d)

F-6-P ---> F-1,6-P

33.

when one mole of glyceraldehyde-3-P is converted to lactate via the reactions of the glycolytic pathway, ____ mole(s) of ATP and ____ mole(s) of lactate will result.

a)

2 -- 2

b)

1 -- 4

c)

4 -- 1

d)

2 -- 1

34.

which of the following components of the pentose pathway is also found in the glycolytic pathway?

a)

ribose-5-P

b)

pyruvate

c)

F-1,6-P

d)

glyceraldehyde-3-P

35.

during glycolysis, substrate-level phosphorylation requires the metabolite ____ to provide the energy needed to produce ATP.

a)

G-6-P

b)

pyruvate

c)

phosphoenolpyruvate

d)

F-1,6-P

36.

the pentose pathway relies on the oxidizing agent ____ to oxidize G-6-P and produce ____, that can be used in generating nucleotides.

a)

NADP+ -- ribose-5-P

b)

NADP+ -- G-3-P

c)

NADH -- F-6-P

d)

NAD+ -- F-1,6-P

37.

allosteric control of the glycolytic pathway is accomplished as the agent ____ inhibits the enzyme ____.

a)

NAD+ -- phosphofructokinase

b)

lactate -- hexokinase

c)

ATP -- PFK

d)

NADH -- lactate dehydrogenase