Question 1

Starch is produced by ________,and its major function is ________.

Accepted Answer

A)  animals; energy storage
B)  animals; as a structural component
C)  plants; as a structural component
D)  plants; energy storage
E)  none of the aboveF) C) and D)
G) A) and E)

Question 2

How many stereoisomers of an aldotetrose can exist?

Accepted Answer

A)  2
B)  4
C)  8
D)  16
E)  32F) B) and E)
G) A) and B)

Question 3

Which molecule shown is D-glyceraldehyde?

Accepted Answer

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

Question 4

________ of glucose leads to gluconic acid.

Accepted Answer

A)  Oxidation
B)  Reduction
C)  Isomerization
D)  Glycosidation
E)  EsterificationF) A) and B)
G) All of the above

Question 5

Which molecule shown is a D-isomer?

Accepted Answer

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

Question 6

Glycoproteins are formed by bonding an oligosaccharide to a protein through a ________ linkage.

Accepted Answer

A)  glycosidic
B)  glucuronic
C)  imine
D)  ester
E)  etherF) A) and D)
G) B) and E)

Question 7

The following compound can be described as a(an)

Accepted Answer

A)  uronic acid.
B)  an aldonic acid.
C)  a sugar phosphate.
D)  an amino sugar derivative.
E)  a disaccharide.F) A) and B)
G) A) and C)

Question 8

All of the statements concerning monosaccharides are correct except

Accepted Answer

A)  the number of stereoisomers possible is 2n,where n is the number of chiral carbon atoms in the molecule.
B)  monosaccharides with 5 or 6 carbon atoms exist in solution in cyclic form.
C)  the two different cyclic forms of a particular monosaccharide are called tautomers.
D)  a molecule is classified as a D or L isomer by the position of the hydroxyl group on the chiral center farthest from the carbonyl group.
E)  monosaccharides have the general formula Cn(H2O) n,but this only describes the number and kinds of atoms,not their structure.F) B) and C)
G) A) and D)

Question 9

Glycogen is produced by ________,and its major function is ________.

Accepted Answer

A)  animals; energy storage
B)  animals; as a structural component
C)  plants; as a structural component
D)  plants; energy storage
E)  none of the aboveF) A) and E)
G) B) and D)

Question 10

Which of the following statements comparing amylopectin and glycogen is false?

Accepted Answer

A)  Both serve as energy storage molecules.
B)  Both are polymers of α-D-glucose.
C)  Glycogen molecules are generally larger than amylopectin molecules.
D)  Glycogen is more highly branched than amylopectin.
E)  none of the aboveF) A) and E)
G) A) and D)

Question 11

Match the following.
-sucrose

Accepted Answer

A)  isomers of cyclic sugars that differ in the position of the hydroxyl group at the hemiacetal carbon atom
B)  an aldopentose that is a component of nucleic acids
C)  a monosaccharide that is sweeter than sucrose and found in honey and fruits
D)  a monosaccharide that functions as the transport form of carbohydrates in blood
E)  stereoisomers that are not mirror images of each otherF) a carbohydrate that yields two monosaccharides upon hydrolysisG) a disaccharide composed of one molecule of glucose and one molecule of galactoseH) a carbohydrate that can be oxidized to produce an acid molecule or its corresponding anionI) a very highly branched polysaccharide composed of glucose unitsJ) a carbohydrate composed of a large number of monosaccharides chemically combinedK) mirror-image forms of chiral moleculesL) a disaccharide composed of one molecule of glucose and one molecule of fructoseM) a disaccharide composed of two molecules of glucoseN) a monosaccharide which is a component of milk sugarO) a polysaccharide composed of glucose units joined by β-1,4 linkagesP) a component of starch composed of glucose units joined by a-1,4 linkagesQ) H) and O)
R) None of the above

Question 12

How many chiral carbons are contained in a molecule of ribose?

Accepted Answer

A)  1
B)  2
C)  3
D)  4E) C) and D)
F) A) and C)

Question 13

How many stereoisomers of an aldopentose can exist?

Accepted Answer

A)  2
B)  4
C)  8
D)  16
E)  32F) A) and D)
G) C) and E)

Question 14

Fructose is similar to glucose and galactose in all of the following aspects except

Accepted Answer

A)  it is a ketose.
B)  it forms a hemiacetal ring.
C)  it can undergo mutarotation from α to β anomers.
D)  its formula is C6H12O6.
E)  none of the aboveF) C) and E)
G) B) and D)

Question 15

Explain why cows and other grazing animals can eat grass and benefit from its nutritive value,but humans cannot.

Accepted Answer

Humans do not have the enzyme that break...

Question 16

Match the following.
-ribose

Accepted Answer

A)  isomers of cyclic sugars that differ in the position of the hydroxyl group at the hemiacetal carbon atom
B)  an aldopentose that is a component of nucleic acids
C)  a monosaccharide that is sweeter than sucrose and found in honey and fruits
D)  a monosaccharide that functions as the transport form of carbohydrates in blood
E)  stereoisomers that are not mirror images of each otherF) a carbohydrate that yields two monosaccharides upon hydrolysisG) a disaccharide composed of one molecule of glucose and one molecule of galactoseH) a carbohydrate that can be oxidized to produce an acid molecule or its corresponding anionI) a very highly branched polysaccharide composed of glucose unitsJ) a carbohydrate composed of a large number of monosaccharides chemically combinedK) mirror-image forms of chiral moleculesL) a disaccharide composed of one molecule of glucose and one molecule of fructoseM) a disaccharide composed of two molecules of glucoseN) a monosaccharide which is a component of milk sugarO) a polysaccharide composed of glucose units joined by β-1,4 linkagesP) a component of starch composed of glucose units joined by a-1,4 linkagesQ) A) and B)
R) G) and H)

Question 17

When a monosaccharide forms a cyclic hemiacetal,the carbon atom that contained the carbonyl group is identified as the ________ carbon atom because

Accepted Answer

A)  D; the carbonyl group is drawn to the right.
B)  L; the carbonyl group is drawn to the left.
C)  anomeric; its substituents can assume an α or a β position.
D)  acetal; it forms bonds to an -OR and an -OR'.
E)  enantiomeric; depending on its position,the resulting ring can have a mirror image.F) All of the above
G) A) and D)

Question 18

Match the following.
-galactose

Accepted Answer

A)  isomers of cyclic sugars that differ in the position of the hydroxyl group at the hemiacetal carbon atom
B)  an aldopentose that is a component of nucleic acids
C)  a monosaccharide that is sweeter than sucrose and found in honey and fruits
D)  a monosaccharide that functions as the transport form of carbohydrates in blood
E)  stereoisomers that are not mirror images of each otherF) a carbohydrate that yields two monosaccharides upon hydrolysisG) a disaccharide composed of one molecule of glucose and one molecule of galactoseH) a carbohydrate that can be oxidized to produce an acid molecule or its corresponding anionI) a very highly branched polysaccharide composed of glucose unitsJ) a carbohydrate composed of a large number of monosaccharides chemically combinedK) mirror-image forms of chiral moleculesL) a disaccharide composed of one molecule of glucose and one molecule of fructoseM) a disaccharide composed of two molecules of glucoseN) a monosaccharide which is a component of milk sugarO) a polysaccharide composed of glucose units joined by β-1,4 linkagesP) a component of starch composed of glucose units joined by a-1,4 linkagesQ) C) and L)
R) B) and P)

Question 19

Fructose can be classified as a(an)

Accepted Answer

A)  aldoketose.
B)  aldopentose.
C)  aldohexose.
D)  ketopentose.
E)  ketohexose.F) None of the above
G) A) and B)

Question 20

How many stereoisomers are possible for the following molecule?

Accepted Answer

A)  1
B)  2
C)  4
D)  8
E)  16F) B) and E)
G) A) and E)

Exam 21: Carbohydrates

How many chiral carbons are contained in a molecule of ribose?

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How many stereoisomers are possible for the following molecule?

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How many stereoisomers of an aldotetrose can exist?

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All of the statements concerning monosaccharides are correct except

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Match the following. -ribose

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Which of the following statements comparing amylopectin and glycogen is false?

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________ of glucose leads to gluconic acid.

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Which molecule shown is D-glyceraldehyde?

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The following compound can be described as a(an)

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Glycogen is produced by ________,and its major function is ________.

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Which molecule shown is a D-isomer?

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How many stereoisomers of an aldopentose can exist?

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When a monosaccharide forms a cyclic hemiacetal,the carbon atom that contained the carbonyl group is identified as the ________ carbon atom because

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Fructose can be classified as a(an)

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Fructose is similar to glucose and galactose in all of the following aspects except

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Starch is produced by ________,and its major function is ________.

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Match the following. -galactose

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Explain why cows and other grazing animals can eat grass and benefit from its nutritive value,but humans cannot.

Correct AnswerverifiedHumans do not have the enzyme that break...View AnswerShow Answer

Glycoproteins are formed by bonding an oligosaccharide to a protein through a ________ linkage.

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Match the following. -sucrose

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Glycogen is produced by ,and its major function is .

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Starch is produced by ,and its major function is .

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Humans do not have the enzyme that break...
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