Biochem module 4 exam Questions With Complete Solutions

Biochem module 4 exam Questions With
Complete Solutions
Which of the following monosaccharides is a ketose?

Dihydroxyacetone
Galactose
Glucose
Glyceraldehyde
Idose correct answer: dihydroxyacetone

When two carbohydrates are epimers:

One is a pyranose, the other a furanose
One is an aldose, the other a ketose
They differ in length by one carbon
They differ only in the configuration about one carbon atom
They react differently with iodine correct answer: They differ
only in the confirmation about one carbon atom

correct answer: D.) alpha-D-glucose and beta-D-glucose

Lactose is made from linking galactose and glucose. When this
happens, _____.

Gas is eliminated
An anomeric carbon is formed on carbon-1
Water is released
An epimer is formed

, An aldose is formed correct answer: water is released

Amylose and amylopectin are both polymers of:
A) α-D-glucose
B) β-D-glucose
C) Galactose
D) Idose
E) Maltose correct answer: A.) alpha-D-glucose

Which statement about starch and glycogen is false?

A) Both have β-D-glucose monomers

B) Both starch and glycogen are energy storage polysaccharides

C) Both are homopolymers of glucose

D) Glycogen is more extensively branched than starch

E) Both have O-glycosidic linkages correct answer: A.) both
have beta-D-Glucose monomers

Which monosaccharide is not a six-carbon monosaccharide?

Fructose
Ribose
Mannose
Galactose
Glucose correct answer: ribose