Question 1

Starch contains two polymers of glucose, they are amylose and amylopectin. Amylose differs from amylopectin in that

Accepted Answer

A)   amylopectin contains fructose and amylose does not.
B)   amylose contains fructose and amylose does not.
C)   amylose is highly branched and amylopectin is not.
D)   amylopectin is highly branched and amylose is not.E) A) and D)
F) All of the above

Question 2

A monosaccharide has an aldehyde functional group as well as five carbon atoms. This monosaccharide is a(n) ___.

Accepted Answer

The answer of A monosaccharide has an aldehyde functional group...

Question 3

What is the structural difference between $\alpha$-D-galactopyranose and $\alpha$-D-glucopyranose?

Accepted Answer

The two compounds differ only in the con...

Question 4

Shown below is a Fisher projection of galactose. 
 
-Is the galactose structure shown above a D or an L sugar?

Accepted Answer

The answer of Shown below is a Fisher projection of...

Question 5

Which of the following is an alcohol sugar?

Accepted Answer

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

Question 6

Chose the incorrect statement referring to starches.

Accepted Answer

A)   Starches are produced by plants for the storage of energy.
B)   Starch is composed of two homopolysaccharides-amylose and amylopectin.
C)   Starch forms helical shapes, rather than forming up in sheets of polysaccharides.
D)   Starches are the structural material of animal cells.E) A) and C)
F) B) and C)

Question 7

Monosaccharides that react with Benedict's solution are known as ___ sugars.

Accepted Answer

The answer of Monosaccharides that react with Benedict's solution are...

Question 8

Why can't humans digest cellulose, but can digest starch?

Accepted Answer

Our enzymes can hydrolyze alph...

Question 9

What is the name of this compound?

Accepted Answer

A)    α\alphaα -D-ribofuranose
B)   α\alphaα -D-2-deoxyribofuranose
C)    α\alphaα -D-3-deoxyribofuranose
D)   -D-ribose E) B) and D)
F) A) and B)

Question 10

Choose the compound that is a ketotetrose.

Accepted Answer

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

Question 11

What is the relationship of these compounds to each other?

Accepted Answer

A)   Compounds II and III are enantiomers; compound I is not related to II and III.
B)   Compounds I and II are enantiomers; III is a diastereomer of I and II.
C)   Compounds I and II are enantiomers; compound III is not related to I and II.
D)   These three compounds are not related to each other; they only look similar.E) A) and B)
F) A) and C)

Question 12

Alpha and beta anomers can interconvert by a process known as ___.

Accepted Answer

The answer of Alpha and beta anomers can interconvert by...

Question 13

A pair of compounds are stereoisomers and they are nonsuperimposable mirror images. This pair of isomers is referred to as a pair of enantiomers.

Accepted Answer

A) True 
 B)False

Question 14

___ is the energy storage polysaccharide of plants and ___ is the energy storage polysaccharide for animals.

Accepted Answer

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

Question 15

A drug's enantiomers can be responsible for the desired physiologic effects, while the other enantiomer is less active, inactive, or sometimes even responsible for adverse effects.

Accepted Answer

A) True 
 B)False

Question 16

What is the product of the following reaction?

Accepted Answer

A)   
B)   
C)   
D)   E) C) and D)
F) A) and C)

Question 17

How would this compound be classified?

Accepted Answer

A)   carboxylic carbohydrate
B)   hydroxyaldehyde
C)   ketotriose
D)   aldotrioseE) A) and B)
F) B) and C)

Question 18

A pyranose is composed of a ___-membered ring.

Accepted Answer

The answer of A pyranose is composed of a ___-membered...

Question 19

The disaccharides are important in nature; a few examples of disaccharides are

Accepted Answer

A)   D-abqueose, D-fructose, galactose, and glucose.
B)   raffinose, stachyose, and verbascose.
C)   cellobiose, lactose, maltose, and sucrose.
D)   amylopectin, amylose, and starch.E) A) and C)
F) B) and C)

Question 20

Hyaluronic acid solutions serve as lubricants in the fluid of joints and are present in the vitreous humor of the eye. A portion of its structure is shown below.
 Which of the following statements is true?

Accepted Answer

A)   Hyaluronic acid is a homopolysaccharide.
B)   Hyaluronic acid is a heteropolysaccharide.
C)   Hyaluronic acid is made of D-glucose residues.
D)   The monosaccharide residues in hyaluronic acid are of furanose form.E) A) and C)
F) A) and D)

Exam 10: Carbohydrates

Why can't humans digest cellulose, but can digest starch?

Correct AnswerverifiedOur enzymes can hydrolyze alph...View AnswerShow Answer

___ is the energy storage polysaccharide of plants and ___ is the energy storage polysaccharide for animals.

Correct AnswerverifiedShow Answer

Monosaccharides that react with Benedict's solution are known as ___ sugars.

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What is the product of the following reaction?

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Starch contains two polymers of glucose, they are amylose and amylopectin. Amylose differs from amylopectin in that

Correct AnswerverifiedShow Answer

Hyaluronic acid solutions serve as lubricants in the fluid of joints and are present in the vitreous humor of the eye. A portion of its structure is shown below. Which of the following statements is true?

Correct AnswerverifiedShow Answer

A monosaccharide has an aldehyde functional group as well as five carbon atoms. This monosaccharide is a(n) ___.

Correct AnswerverifiedShow Answer

How would this compound be classified?

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Alpha and beta anomers can interconvert by a process known as ___.

Correct AnswerverifiedShow Answer

What is the relationship of these compounds to each other?

Correct AnswerverifiedShow Answer

A pair of compounds are stereoisomers and they are nonsuperimposable mirror images. This pair of isomers is referred to as a pair of enantiomers.

Correct AnswerverifiedShow Answer

Chose the incorrect statement referring to starches.

Correct AnswerverifiedShow Answer

The disaccharides are important in nature; a few examples of disaccharides are

Correct AnswerverifiedShow Answer

A drug's enantiomers can be responsible for the desired physiologic effects, while the other enantiomer is less active, inactive, or sometimes even responsible for adverse effects.

Correct AnswerverifiedShow Answer

What is the name of this compound?

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A pyranose is composed of a ___-membered ring.

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Choose the compound that is a ketotetrose.

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Shown below is a Fisher projection of galactose. -Is the galactose structure shown above a D or an L sugar?

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Which of the following is an alcohol sugar?

Correct AnswerverifiedShow Answer

What is the structural difference between α\alphaα -D-galactopyranose and α\alphaα -D-glucopyranose?

Correct AnswerverifiedThe two compounds differ only in the con...View AnswerShow Answer

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Our enzymes can hydrolyze alph...
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_ is the energy storage polysaccharide of plants and _ is the energy storage polysaccharide for animals.

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What is the name of this compound? $What is the name of this compound? A) \alpha -D-ribofuranose B) \alpha -D-2-deoxyribofuranose C) \alpha -D-3-deoxyribofuranose D) -D-ribose$

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What is the structural difference between $\alpha$ -D-galactopyranose and $\alpha$ -D-glucopyranose?

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The two compounds differ only in the con...
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