Chem 221 - Biochemistry for Science Majors » Fall 2021 » L12 Carbohydrates Part 2 of 2
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Question #1
Structural analogue of starch is
A.
sucrose
B.
cellulose
C.
glycogen
Question #2
Hydrolysis of cellulose yields:
A.
galactose
B.
sucrose
C.
starch
D.
glucose
E.
fructose
Question #3
A condensation reaction is when water is added to form a molecule.
A.
FALSE
B.
TRUE
Question #4
Hydrolysis of sucrose yields:
A.
galactose and glucose
B.
glucose
C.
glucose and fructose
D.
galactose and fructose
Question #5
Cellulose in found in
A.
plants
B.
animals
C.
both plants and animals
Question #6
Glycogen is found in
A.
Animals
B.
Both plants and animals
C.
Plants
Question #7
How many water molecules are released when sucrose is made from its monomers?
A.
0
B.
1
C.
4
D.
3
E.
2
Question #8
How many water molecules are released when lactose is made from its monomers?
A.
3
B.
0
C.
1
D.
4
E.
2
Question #9
How many water molecules are needed to hydrolyze 50 molecules of sucrose?
A.
50
B.
51
C.
100
D.
49
Question #10
Starch and glycogen are both polymers of:
A.
alpha-d-glucose
B.
beta-d-glucose
C.
glucose1-phosphate
D.
fructose
E.
sucrose
Question #11
A positive Benedict’s test is NOT given by
A.
Glucose
B.
Maltose
C.
Lactose
D.
Sucrose
Question #12
Humans are unable to digest
A.
complex carbohydrates
B.
denatured proteins
C.
cellulose
D.
starch
Question #13
Hydrolysis of lactose yields
A.
galactose and fructose
B.
glucose and fructose
C.
glucose
D.
galactose and glucose
Question #14
Storage polysaccharide made by animals is
A.
glycogen
B.
cellulose
C.
collagen
D.
amylopectin
Question #15
Which of the following is not a disaccharide?
A.
None of these
B.
Lactose
C.
sucrose
D.
Amylose
Question #16
What is the molecular formula of sucrose?
A.
C10H20O10
B.
C12H20O11
C.
C6H12O6
D.
C12H22O11
Question #17
Glycosidic bond in sucrose is____
A.
α, β 1 – 2
B.
β 1 – 2
C.
α, α 1 – 4
D.
β, α 1 – 4
Question #18
What is the major constituent of plant cell wall?
A.
Chitin
B.
Starch
C.
Glycogen
D.
Cellulose
Question #19
What best describes amylose?
A.
Unbranched linear polymer with alpha 1-4 glycosidic linkages
B.
Highly branched, branched sites contain alpha 1-6 glycosidic linkages
C.
Highly branched, branched sites contain beta 1-6 glycosidic linkages
D.
Unbranched linear polymer with beta 1-4 glycosidic linkages
Question #20
What best describes amylopectin?
A.
Highly branched, branched sites contain beta 1-6 glycosidic linkages
B.
Highly branched, branched sites contain alpha 1-6 glycosidic linkages
C.
Unbranched linear polymer with alpha 1-4 glycosidic linkages
D.
Unbranched linear polymer with beta 1-4 glycosidic linkages
Question #21
Where is glycogen stored?
A.
In the muscle and stomach
B.
In the muscle and liver
C.
In the stomach and kidney
D.
In the kidney and liver
Question #22
In amylopectin the intervals of glucose units of each branch is
A.
30–40
B.
10–20
C.
24–30
D.
40–50
Question #23
The color of the Benedict solution in the presence of a reducing sugar is
A.
blue
B.
green
C.
brown
D.
silver
Question #24
Choose the false statement.
A.
Amylose is a long, unbranched linear chain
B.
Amylase, must first break down starch into smaller sugars.
C.
Amylopectin is a long, unbranched linear chain
D.
As a result of the bond angles in the α glycosidic linkage, amylose and amylopectin form a spiral, much like a coiled spring.
Question #25
Choose the false statement.
A.
Colorimetric tests for the percentage of amylose and amylopectin are widely used.
B.
The iodine solution slips into the coil of the cellulose causing an intense blue-black color.
C.
Starch is insoluble in water at room temperature
D.
Cellulose is insoluble in water
Question #26
Choose the false statement.
A.
liver and muscles contain a large amount of glucose molecule
B.
In the muscles, glycogen is found in a much lower concentration (1% of the muscle mass), but the total amount exceeds that in liver.
C.
Animals manufacture and store glycogen to serve as a reservoir of readily available glucose.
D.
liver and muscles contain glycogen molecules
Question #27
All disaccharides are reducing sugars.
A.
TRUE
B.
FALSE
Question #28
Choose the correct statement.
A.
disaccharides are gases
B.
Polysaccharides are sweet
C.
monosaccharides are colored
D.
Monosaccharides are solid
Question #29
Choose the correct statement.
A.
Lactase is the enzyme found in the small intestine of mammals that catalyzes the breakdown of lactose into the simple sugars glucose and fructose.
B.
Lactose in a nonreducing sugar
C.
Lactose is found in the milk of many mammals.
D.
Lactase breaks alpha -1,4 - glycosidic bonds.
Question #30
Sucrose is the sweetest sugar of naturally occurring mono and disaccharides
A.
FALSE
B.
TRUE
Question #31
Glycosidic bonds are designated alpha and gamma.
A.
FALSE
B.
TRUE
Question #32
Sucrose has a β-1,4-glycosidic bond.
A.
FALSE
B.
TRUE
Question #33
Lactose intolerant individuals have and excess of lactase.
A.
TRUE
B.
FALSE
Question #34
The end of a chain with a free aldehyde group (one not involved in a glycosidic bond) is commonly called the oxidizing end.
A.
TRUE
B.
FALSE
Question #35
In sucrose, both anomeric carbons are busy and not available for oxidation.
A.
FALSE
B.
TRUE
Question #36
Sucrose has two reducing ends.
A.
FALSE
B.
TRUE
Question #37
A.
FALSE
B.
TRUE
Question #38
Hydrolysis of glycosidic bond involves
A.
formation of hydrogen bond
B.
formation of ionic bond
C.
formation of glycosidic bonds
D.
breakdown of glycosidic bonds
Question #39
Which of the following foods will take longer to digest?
A.
Apple
B.
Grapes
C.
Candy
D.
Bread
Question #40
Starch is composed of
A.
amylose and iodine
B.
amylopectin and amylose
C.
amylose and glycogen
D.
cellulose and amylose
Question #41
Starch is sweet.
A.
TRUE
B.
FALSE
Question #42
The specific glycosidic bond found in cellulose forces cellulose to form a spiral, much like a coiled spring.
A.
FALSE
B.
TRUE
Question #43
A reason for the low solubility of polysaccharides is that there is molecular crowding from polymerization that decreases the ability of adjacent hydroxyl groups from interacting with water.
A.
TRUE
B.
FALSE
Question #44
Starch is produced by most plants as energy storage.
A.
FALSE
B.
TRUE
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