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biochem: carbohydrates

Total questions: 75

Worksheet time: 38mins

Name
Class
Date
1.

Carbon based molecules that have several hydroxyl groups (C-OH)

a)

glycans

b)

lipids

c)

proteins

2.

Energy source

a)

polysaccharides

b)

simple sugars

c)

glycoconjugates

3.

energy storage and structural components

a)

polysaccharides

b)

simple sugars

c)

glycoconjugates

4.

cellular communication, protection, and protein diversification

a)

polysaccharides

b)

simple sugars

c)

glycoconjugates

5.

Glycoproteins (antibodies, viral coat proteins), Proteoglycans (aggrecan, syndecan, glypican), and glycolipids (blood antigens, membrane anchors) are all ____.

a)

simple sugars

b)

polysaccharides

c)

glycoconjugates

6.

glucose homopolymers(cellulose, starch, glycogen) and disaccharide heteropolymers (chitin, keratan sulfate) are all ____.

a)

simple sugars

b)

polysaccharides

c)

glycoconjugates

7.

monosaccharides, disaccharides, oligosaccharides are all _____

a)

glycoconjugates

b)

simple sugars

c)

polysaccharides

8.

Which of the following is the simplest sugar possible?

a)

5 carbon sugar

b)

6 carbon sugar

c)

3 carbon sugar

9.

How are carbohydrates classified?

a)

by how many carbons they have

b)

whether or not they contain an alcohol

c)

by the carbonyl group they contain

10.

Dihydroxyacetone

a)

aldose

b)

ketose

11.

glyceraldehyde

a)

aldotriose

b)

ketotriose

12.

have identical molecular formulas but differ in order of attachment

a)

stereoisomers

b)

constitutional isomer

c)

diastereoisomers

d)

epimers

13.

which of the following?

a)

Epimer

b)

constitutional isomer

c)

stereosomer

d)

enantiomer

14.

isomers that differ in spatial arrangement are ___.

a)

epimers

b)

constitutional isomer

c)

stereoisomers

d)

diastereomer

15.

stereoisomers that are nonsuperimposable mirror images

a)

diastereoisomer

b)

constitutional isomer

c)

epimer

d)

enantiomers

16.

which of the following?

a)

enantiomer

b)

constitutional isomer

c)

diastereomer

d)

epimer

17.

most hexoses in living organisms are ____.

a)

L stereoisomer

b)

D stereoisomers

18.

Sugars have chirality.

a)

True

b)

False

19.

steroisomers that are not mirror images

a)

enantimer

b)

epimer

c)

diastereomer

d)

constitutional isomer

20.

possible stereoisomers equal 2^n

a)

True

b)

False

21.

How many possible diastereoismers would a 6 carbon aldose with 4 symmetric carbons have?

a)

64

b)

16

c)

4

d)

0

22.

Diastereomers have the same physical properties.

a)

True

b)

False

23.

Which of the following?

a)

epimer

b)

diastereoisomers

c)

constitutional isomer

d)

enantiomer

24.

differ at one chiral center (differ at 1 asymmetric center)

a)

constitutional isomer

b)

enantiomer

c)

epimer

25.

which of the following

a)

epimer

b)

enantiomer

c)

constitutional isomer

26.

6 carbon aldoses are the most commonly seen sugars in biochemical processes.

a)

True

b)

False

27.

What is the standard 6 carbon sugar?

a)

mannose

b)

fructose

c)

glucose

d)

galactose

28.

What form of common monosaccharides predominate in solution?

a)

cyclic form

b)

linear form

29.

a 5 carbon ring

a)

fructose

b)

glucose

c)

mannose

d)

glucopyranose

30.

What is the 5 carbon ring of fructose called?

a)

purine

b)

pyrimidine

c)

galactose

d)

furan

31.

During cyclization, what part of the sugar attacks the carbonyl carbon on a linear sugar?

a)

the ketone

b)

the last carbon

c)

the OH group (alcohol)

32.

The hydroxyl is below the ring.

a)

a- form

b)

B-form

33.

The OH is above the ring.

a)

a-form

b)

B-form

34.

Which one?

a)

alpha form

b)

beta form

35.

which one?

a)

alpha

b)

beta

36.

sugars that react with oxidizing agents are called _____

a)

non-reducing sugars

b)

reducing sugars

37.

sugars that do not react with oxidizing agents

a)

nonreducing sugars

b)

reducing sugars

38.

anomeric carbon is the reducing end of sugars.

a)

True

b)

False

39.

Glucose is a nonreducing sugar.

a)

True

b)

False

40.

Glycosylation of hemoglobin has no effect on the oxygen binding ability of hemoglobin.

a)

True

b)

False

41.

Glycosylation of hemoglobin lasts the entire life of the red blood cell.

a)

True

b)

False

42.

Uncontrolled diabetics will have less glycosylated hemoglobin in their blood.

a)

True

b)

False

43.

compounds that contain a single carbonyl group and 2 or more hydroxyl groups.

a)

polysaccharide

b)

oligosaccharide

c)

monosaccharide

44.

2 sugars linked together by O-glycosidic bonds.

a)

disaccharide

b)

monosaccharide

c)

oligosaccharide

d)

polysaccharide

45.

2 or more sugars linked by O-glycosidic bonds (play key role in cell-cell interaction).

a)

monosaccharide

b)

oligosaccharide

c)

polysacchride

46.

formed when many monosaccharides are bonded together.

a)

oligosaccharide

b)

monosaccharide

c)

polysaccharide

47.

Glucose and Glucose form

a)

maltose

b)

sucrose

c)

lactose

48.

glucose and fructose form

a)

maltose

b)

sucrose

c)

lactose

49.

glucose and galactose form

a)

maltose

b)

sucrose

c)

lactose

50.

What type of linkage does sucrose have?

a)

a-1, B-2 linkage

b)

a-1, a-4 linkage

c)

B-1, B-4 linkage

51.

What type of linkage does lactose have?

a)

a-1,a-4

b)

a-1,B-2

c)

B-1,B-4

52.

What kind of linkage does maltose have?

a)

a-1,a-4

b)

a-1,B-2

c)

B-1,B-4

53.

which one?

a)

maltose

b)

sucrose

c)

lactose

54.

which one?

a)

maltose

b)

sucrose

c)

lactose

55.

which one?

a)

maltose

b)

sucrose

c)

lactose

56.

one monomer unit that is all the same

a)

homopolysaccharides

b)

heteropolysaccharides

57.

homopolysaccharides are found in humans and plants while heteropolysaccharides are not.

a)

True

b)

False

58.

storage form of glucose in plants

a)

glycogen

b)

starch

59.

nonbranched form of starch?

a)

amylopectin

b)

amylose

c)

glycogen

60.

branched form of starch?

a)

amylopectin

b)

amylose

c)

glycogen

61.

what is the structural polysaccharide in plants? (not the storage form)

a)

amylopectin

b)

amylose

c)

cellulose

d)

glycogen

62.

what is the difference between cellulose and glycogen?

a)

cellulose has B-1,4 glycosidic bonds while glycogen has a-1,4 glycosidic bonds

b)

cellulose has a-1,4 glycosidic bonds while glycogen has B-1,4 glycosidic bonds

c)

cellulose has N linkages while glycogen has O linkages

63.

starch and glycogen both have a-1,4 linkages.

a)

True

b)

False

64.

amines are joined to glucose through

a)

O-glycosidic bonds

b)

N-glycosidic bonds

c)

ester linkages

65.

alcohols are joined to glucose through

a)

O-glycosidic bonds

b)

N-glycosidic bonds

c)

ester linkages

66.

phosphates are joined to carbohydrates through

a)

O-glycosidic bonds

b)

N-glycosidic bonds

c)

ester linkages

67.

phosphates add positive charge to sugars.

a)

True

b)

False

68.

Play structural roles or act as lubricants.

a)

glycoproteins

b)

proteoglycans

c)

mucins or mucoproteins

69.

membrane proteins

a)

glycoproteins

b)

proteoglycans

c)

mucins or mucoproteins

70.

selubricants

a)

glycoproteins

b)

proteoglycans

c)

mucins or mucoproteins

71.

carbohydrates can connect to serine through either an O-linkage or an N-linkage.

a)

True

b)

False

72.

proteoglycan-glycosaminoglycans are a type of polysaccharide based on a repeating disaccharide in which

a)

one of the sugars is an amino sugar

b)

not this one

73.

chondroitin-4-sulfate

a)

in connective tissues

b)

anticoagulant

c)

in joints and eye

74.

hyaluronate

a)

in joints and eyes

b)

connective tissue

c)

anticoagulant

75.

glycoconjugate where a lipid is attached to a sugar.

a)

glycoprotein

b)

glycolipid