Lesson 1: Carbohydrates

Question 1

A D-configuration of a monosaccharide has its hydroxyl group on the left. True or False?

Answer 1

False

Question 2

Amylose

Select one:

a. Is made up exclusively of glucose molecules
b. Has α 1-4 glycosidic bonds
c. All of these answers are correct
d. Is a linear unbranched polymer
e. Is a polysaccharide

Answer 2

c. All of these answers are correct

Question 3

An aldopentose has

Select one:

a. An aldehyde group and three carbons
b. A ketone group and three carbons
c. An aldehyde group and six carbons
d. A ketone group and five carbons
e. An aldehyde group and five carbons

Answer 3

e. An aldehyde group and five carbons

Question 4

Enantiomers are stereoisomers that are not mirror images. True or False?

Answer 4

False

Question 5

Galactose has

Select one:

a. 5 carbon atoms
b. 6 carbon atoms
c. 4 carbon atoms
d. 3 carbon atoms
e. 7 carbon atoms

Answer 5

b. 6 carbon atoms

Question 6

Glycogen is found primarily in

Select one:

a. Wood
b. Plant seeds
c. Liver and skeletal muscle
d. Liver
e. Skeletal muscle

Answer 6

c. Liver and skeletal muscle

Question 7

Homopolysaccharides are composed of only a single type of monosaccharide unit. True or False?

Answer 7

True

Question 8

Humans are unable to use the glucose stored in cellulose as an energy source. True or False?

Answer 8

True

Question 9

Lactose is made up of

Select one:

a. Glucose only
b. Fructose and galactose
c. Galactose only
d. Glucose and galactose
e. Glucose and fructose

Answer 9

d. Glucose and galactose

Question 10

Monosaccharide units of polysaccharides are joined by

Select one:

a. Amino linkages
b. Phosphate ester linkages
c. Glycosidic linkages
d. Alditol linkages
e. None of these answers are correct

Answer 10

c. Glycosidic linkages

Question 11

Monosaccharides containing a ketone group are classified as ketoses. True or False?

Answer 11

True

Question 12

The anomeric carbon of an aldose is

Select one:

a. Carbon 5
b. Carbon 3
c. Carbon 4
d. Carbon 1
e. Carbon 2

Answer 12

d. Carbon 1

Question 13

The simplest carbohydrate is called

Select one:

a. A monosaccharide
b. An amino acid
c. A carbon
d. Sucrose
e. A fatty acid

Answer 13

a. A monosaccharide

Question 14

Which of the following is NOT a common disaccharide

Select one:

a. Lactose
b. Maltose
c. Fructose
d. None of these answers are correct
e. Sucrose

Answer 14

c. Fructose

Question 15

Which of the following is NOT an amino sugar?

Select one:

a. D-galactosamine
b. D-glucosamine
c. D-fructose
d. D-mannosamine
e. All of these are amino sugars

Answer 15

c. D-fructose