TEST #4
CORRECT ANSWERS IN RED
Which of the following monosaccharides is not an aldose?
Erythrose
Dihydroxyacetone
Glucose
Glyceraldehyde
Ribose
Question 2
When two monosaccharides are epimers:
They differ only in the configuration about the penultimate carbon
One is an aldose, the other a ketose
They differ only in the configuration about one carbon atom
They form O-glycosidic bonds
They are oligosaccharides
Question 3
Which pair is anomeric?
A) -D-talose and -D-talose
B) D-ribose and D-galactose
C) D-allose and L-fructose
D) D-galactose and L-galactose
E) -D-mannose and -L-mannose
A
B
C
, D
E
Question 4
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
Lactose forms by a condensation reaction
Question 5
Amylose and amylopectin are both polymers of:
A) -D-glucose
B) -D-glucose
C) Galactose
D) Idose
E) Maltose
A
B
C
D
E
Question 6
Which statement about starch and glycogen is false?
A) Amylose is unbranched; amylopectin and glycogen contain many ( 1 6) branches
B) Both are heteropolymers of glucose
CORRECT ANSWERS IN RED
Which of the following monosaccharides is not an aldose?
Erythrose
Dihydroxyacetone
Glucose
Glyceraldehyde
Ribose
Question 2
When two monosaccharides are epimers:
They differ only in the configuration about the penultimate carbon
One is an aldose, the other a ketose
They differ only in the configuration about one carbon atom
They form O-glycosidic bonds
They are oligosaccharides
Question 3
Which pair is anomeric?
A) -D-talose and -D-talose
B) D-ribose and D-galactose
C) D-allose and L-fructose
D) D-galactose and L-galactose
E) -D-mannose and -L-mannose
A
B
C
, D
E
Question 4
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
Lactose forms by a condensation reaction
Question 5
Amylose and amylopectin are both polymers of:
A) -D-glucose
B) -D-glucose
C) Galactose
D) Idose
E) Maltose
A
B
C
D
E
Question 6
Which statement about starch and glycogen is false?
A) Amylose is unbranched; amylopectin and glycogen contain many ( 1 6) branches
B) Both are heteropolymers of glucose
