Question 1

In deoxy sugars a hydrogen atom replaces one or more of the -OH groups in a monosaccharide.

Accepted Answer

A) True 
 B)False

Question 2

Explain why starch is a source of food while cellulose is a source of fiber in the human diet.

Accepted Answer

Starch is a food source becaus...

Question 3

Sucrose is a disaccharide of D-glucose connected to D-fructose by an  α\alphaα , β\betaβ -(1 →\rightarrow→ 2) - glycosidic bond. Sucrose is not a reducing sugar because

Accepted Answer

A)   it is a disaccharide.
B)   it reacts with Benedict's solution.
C)   it contains both glucose and fructose.
D)   it cannot react to produce an aldehyde group. E) A) and B)
F) All of the above D

Question 4

carbohydrate containing six carbons is broadly referred to as a(an) ___.

Accepted Answer

The answer of carbohydrate containing six carbons is broadly referred...

Question 5

What is the product of the following reaction?

Accepted Answer

A)   
B)   
C)   
D)   E) B) and C)
F) All of the above

Question 6

What is the classification of this monosaccharide?

Accepted Answer

A)   aldotriose
B)   ketotriose
C)   aldotetrose
D)   ketotetroseE) A) and B)
F) A) and C) C

Question 7

Name and describe the two types of polysaccharides in starch.

Accepted Answer

Starch is composed o...

Question 8

In sugar chemistry, diastereomers that differ at only one chiral carbon atom are called ___.

Accepted Answer

The answer of In sugar chemistry, diastereomers that differ at...

Question 9

A molecule humans produce by combining glucose molecules for energy storage is ___.

Accepted Answer

The answer of A molecule humans produce by combining glucose...

Question 10

Which of the following is a uronic acid?

Accepted Answer

A)   
B)   
C)   
D)   E) A) and D)
F) None of the above

Question 11

Starch and cellulose are both polysaccharides of glucose. Cellulose differs from starch in that

Accepted Answer

A)   cellulose contains glucose molecules connected by  α\alphaα - (1 →\rightarrow→ 4)  glycosidic bonds.
B)   cellulose contains glucose molecules connected by  β\betaβ - (1 →\rightarrow→ 4)  glycosidic bonds.
C)   cellulose is more highly branched than starch.
D)   cellulose is the energy storage molecule of plants. E) A) and C)
F) None of the above B

Question 12

What is mutarotation?

Accepted Answer

A)   The conversion of a D-monosaccharide into an L-monosaccharide.
B)   The conversion of  α\alphaα -D-galacose into  β\betaβ -D-galactose.
C)   The conversion of a pyranose into a furanose.
D)   The conversion of an aldose into a ketose. E) A) and B)
F) None of the above

Question 13

___ is the structural material for plants while ___ is the energy storage material of plants.

Accepted Answer

A)   Cellulose/starch
B)   Starch/cellulose
C)   Glycogen/starch
D)   Starch/glycogenE) A) and B)
F) C) and D)

Question 14

Sketch the structure of the product formed when carbon 1 of galactose is oxidized by Benedict's solution.

Accepted Answer

The answer of Sketch the structure of the product formed...

Question 15

Shown below is a cyclic form of D-galactose. This structure is classified as ___.

Accepted Answer

A)    α\alphaα -D-galactopyranose
B)    β\betaβ  -D-galactofuranose
C)    α\alphaα -D-galactofuranose
D)    β\betaβ  -D-galactopyranose E) B) and C)
F) None of the above

Question 16

How many chiral carbons are present in the structure below?

Accepted Answer

A)   2
B)   3
C)   4
D)   5E) None of the above
F) C) and D)

Question 17

Shown below is Lactose. Explain why lactose is a reducing sugar.

Accepted Answer

The cyclic glucose residue with the hemi...

Question 18

Even though maltose is an animal product and cellobiose is produced by plants, both carbohydrates produce ___ molecules when hydrolyzed.

Accepted Answer

The answer of Even though maltose is an animal product...

Question 19

Oligosaccharides contain 2-10 monosaccharide residues.

Accepted Answer

A) True 
 B)False

Question 20

Shown below is a cyclic form of D-glucose. This structure is classified as ___.

Accepted Answer

A)    α\alphaα -D-glucopyranose
B)    β\betaβ - D-glucofuranose
C)    α\alphaα -D-galactopyranose
D)    β\betaβ  - L-glucopyranose E) B) and D)
F) None of the above

Exam 10: Carbohydrates

In deoxy sugars a hydrogen atom replaces one or more of the -OH groups in a monosaccharide.

Correct AnswerverifiedShow Answer

Explain why starch is a source of food while cellulose is a source of fiber in the human diet.

Correct AnswerverifiedStarch is a food source becaus...View AnswerShow Answer

Sucrose is a disaccharide of D-glucose connected to D-fructose by an α\alphaα , β\betaβ -(1 →\rightarrow→ 2) - glycosidic bond. Sucrose is not a reducing sugar because

Correct AnswerverifiedD

carbohydrate containing six carbons is broadly referred to as a(an) ___.

Correct AnswerverifiedShow Answer

What is the product of the following reaction?

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What is the classification of this monosaccharide?

Correct AnswerverifiedC

Name and describe the two types of polysaccharides in starch.

Correct AnswerverifiedStarch is composed o...View AnswerShow Answer

In sugar chemistry, diastereomers that differ at only one chiral carbon atom are called ___.

Correct AnswerverifiedShow Answer

A molecule humans produce by combining glucose molecules for energy storage is ___.

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Which of the following is a uronic acid?

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Starch and cellulose are both polysaccharides of glucose. Cellulose differs from starch in that

Correct AnswerverifiedB

What is mutarotation?

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___ is the structural material for plants while ___ is the energy storage material of plants.

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Sketch the structure of the product formed when carbon 1 of galactose is oxidized by Benedict's solution.

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Shown below is a cyclic form of D-galactose. This structure is classified as ___.

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How many chiral carbons are present in the structure below?

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Shown below is Lactose. Explain why lactose is a reducing sugar.

Correct AnswerverifiedThe cyclic glucose residue with the hemi...View AnswerShow Answer

Even though maltose is an animal product and cellobiose is produced by plants, both carbohydrates produce ___ molecules when hydrolyzed.

Correct AnswerverifiedShow Answer

Oligosaccharides contain 2-10 monosaccharide residues.

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Shown below is a cyclic form of D-glucose. This structure is classified as ___.

Correct AnswerverifiedShow Answer

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Starch is a food source becaus...
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Sucrose is a disaccharide of D-glucose connected to D-fructose by an $\alpha$ , $\beta$ -(1 $\rightarrow$ 2) - glycosidic bond. Sucrose is not a reducing sugar because

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D

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C

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Starch is composed o...
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B

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_ is the structural material for plants while _ is the energy storage material of plants.

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Shown below is a cyclic form of D-galactose. This structure is classified as _. $Shown below is a cyclic form of D-galactose. This structure is classified as _. A) \alpha -D-galactopyranose B) \beta -D-galactofuranose C) \alpha -D-galactofuranose D) \beta -D-galactopyranose$

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The cyclic glucose residue with the hemi...
View Answer

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Shown below is a cyclic form of D-glucose. This structure is classified as _. $Shown below is a cyclic form of D-glucose. This structure is classified as _. A) \alpha -D-glucopyranose B) \beta - D-glucofuranose C) \alpha -D-galactopyranose D) \beta - L-glucopyranose$

Correct Answer
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