Portage Learning Chem 210 Module EXAM 4

Portage Learning Chem 210 Module EXAM 4
Question 1
pts
Which of the following monosaccharides is not an aldose?

Erythrose
Correct!

Dihydroxyacetone

Glucose

Glyceraldehyde

Ribose

Question 2
pts
When two monosaccharides are epimers:

They differ only in the configuration about the penultimate carbon

One is an aldose, the other a ketose
Correct!

They differ only in the configuration about one carbon atom

They form O-glycosidic bonds

They are oligosaccharides

Question 3
pts

Which pair is anomeric?

A) D-glucose and D-fructose
B) D-glucose and L-fructose
C) D-glucose and L-glucose

,D) α -D-glucose and β -D-glucose

E) α -D-glucose and β -L-glucose




A

B

C
Correct!

D

E

Question 4
pts
Lactose is made from linking galactose and glucose. When this happens, .

A polysaccharide is formed

Gas is eliminated

An epimer is formed

An anomeric carbon is formed on carbon-1
Correct!

Lactose forms by a condensation reaction

Question 5
pts

Chitin and cellulose are both polymers of:

A) α -D-glucose

B) Galactose
C) β -D-glucose

D) Idose
E) Maltose

, A

B
Correct!

C

D

E

Question 6
pts

Which statement about starch and glycogen is false?

A) Amylose is unbranched; amylopectin and glycogen contain many ( α1 → 6)

branches
B) Both are heteropolymers of glucose
C) Both have many -OH groups in their structures
D) Both starch and glycogen are energy storage polysaccharides
E) Glycogen is more extensively branched than starch


A
Correct!

B

C

D

E

Question 7
pts
Which monosaccharide is not a six-carbon monosaccharide?

Idose

Gulose

Galactose