Question 1

Which of the following proteins is an example of a glycoprotein?

Accepted Answer

A) casein 
B) fibrin 
C) gamma globulin 
D) myoglobin 
A) casein 
B) fibrin 
C) gamma globulin 
D) myoglobin

Question 2

A large protein undergoes a hydrolysis reaction.The product(s)of such a reaction include _____ .

Accepted Answer

A) amino acids 
B) glycerol 
C) water 
D) Large proteins do not undergo hydrolysis reactions 
A) amino acids 
B) glycerol 
C) water 
D) Large proteins do not undergo hydrolysis reactions

Question 3

Of the many sulfur-containing amino acids,cysteine is the only one that can not form disulfide bridges.

Accepted Answer

A) True 
 B)False

Question 4

The sequence of amino acids in a protein is called the ____ structure.

Accepted Answer

A) primary 
B) secondary 
C) tertiary 
D) quaternary 
A) primary 
B) secondary 
C) tertiary 
D) quaternary

Question 5

Which protein is an important component of hair and feathers?

Accepted Answer

A) "myosin" 
B) "amylase" 
C) "$\alpha$-keratin" 
D) "fibrinogen" 
A) "myosin" 
B) "amylase" 
C) "$\alpha$-keratin" 
D) "fibrinogen"

Question 6

An amino acid that forms a solution with a pH of 3.0 as it is dissolved in distilled water has a side chain with what functional group?

Accepted Answer

A) an amino group 
B) a carboxyl group 
C) a hydroxyl group 
D) a sulfhydryl group 
A) an amino group 
B) a carboxyl group 
C) a hydroxyl group 
D) a sulfhydryl group

Question 7

The tertiary structure of myoglobin reveals that nonpolar portions are primarily on the ____ of the molecule.

Accepted Answer

A) interior 
B) exterior 
C) iron containing portion 
D) oxygen containing portion 
A) interior 
B) exterior 
C) iron containing portion 
D) oxygen containing portion

Question 8

Although the common amino acids all have accepted standard names,they can also be named using the IUPAC organic chemical nomenclature system.Below is the structure for the simplest amino acid,glycine.What would be its IUPAC name?

Accepted Answer

A) 1-hydroxy-2-aminoethanone 
B) 1-carboxy-2-amoinoethanol 
C) 2-carboxy-2-hydroxyethanamine 
D) 2-aminoethanoic acid 
A) 1-hydroxy-2-aminoethanone 
B) 1-carboxy-2-amoinoethanol 
C) 2-carboxy-2-hydroxyethanamine 
D) 2-aminoethanoic acid

Question 9

The following amino acid would be classified as neutral,nonpolar.

Accepted Answer

A) True 
 B)False

Question 10

Which of the following is a function of proteins?

Accepted Answer

A) catalytic 
B) protective 
C) storage 
D) all of these 
A) catalytic 
B) protective 
C) storage 
D) all of these

Question 11

The figure below shows a portion of what type of secondary protein structure?

Accepted Answer

A) alpha helix 
B) beta sheet 
C) neither a or b 
D) insufficient information 
A) alpha helix 
B) beta sheet 
C) neither a or b 
D) insufficient information

Question 12

An ion which is especially effective at causing protein denaturation is Hg2+.

Accepted Answer

A) True 
 B)False

Question 13

What bonding forces are responsible for the secondary structure of a protein?

Accepted Answer

A) disulfide linkages 
B) salt bonds 
C) hydrophobic bonding 
D) hydrogen bonding 
A) disulfide linkages 
B) salt bonds 
C) hydrophobic bonding 
D) hydrogen bonding

Question 14

The biologically important peptides are formed from alpha amino acids.

Accepted Answer

A) True 
 B)False

Question 15

Glycoproteins are a combination of protein and _____ .

Accepted Answer

A) lipids 
B) carbohydrates 
C) nucleic acids 
D) steroids 
A) lipids 
B) carbohydrates 
C) nucleic acids 
D) steroids

Question 16

Protein denaturation results in a disruption of the

Accepted Answer

A) primary structure. 
B) secondary and tertiary structure. 
C) primary and secondary structure. 
D) primary,secondary and tertiary structure. 
A) primary structure. 
B) secondary and tertiary structure. 
C) primary and secondary structure. 
D) primary,secondary and tertiary structure.

Question 17

Which of the following is the structure for alanine?

Accepted Answer

A)    
B)    
C)    
D)    
A)    
B)    
C)    
D)

Question 18

Some proteins owe their functions to the three dimensional shape they have; what is responsible for holding the shape of a protein?

Accepted Answer

A) occurs spontaneously and remains constant 
B) the length of the protein 
C) R-group interactions 
D) is established on the basis of the hydrophobic and hydrophilic forces that develop 
A) occurs spontaneously and remains constant 
B) the length of the protein 
C) R-group interactions 
D) is established on the basis of the hydrophobic and hydrophilic forces that develop

Question 19

Sickle cell anemia is a disease that results from a protein defect related to which of the following structures?

Accepted Answer

A) primary 
B) secondary 
C) tertiary 
D) quaternary 
A) primary 
B) secondary 
C) tertiary 
D) quaternary

Question 20

The major difference between normal hemoglobin and that of sickle cell anemia is

Accepted Answer

A) sickle cell hemoglobin is the L isomer and the normal is the D isomer. 
B) sickle cell hemoglobin is a much smaller molecule than normal hemoglobin. 
C) sickle cell hemoglobin is assembled in a reverse manner. 
D) sickle cell hemoglobin has one different amino acid in each $\beta$-chain. 
A) sickle cell hemoglobin is the L isomer and the normal is the D isomer. 
B) sickle cell hemoglobin is a much smaller molecule than normal hemoglobin. 
C) sickle cell hemoglobin is assembled in a reverse manner. 
D) sickle cell hemoglobin has one different amino acid in each $\beta$-chain.

Exam 19: Proteins

Which of the following proteins is an example of a glycoprotein?

A large protein undergoes a hydrolysis reaction.The product(s)of such a reaction include _____ .

Of the many sulfur-containing amino acids,cysteine is the only one that can not form disulfide bridges.

The sequence of amino acids in a protein is called the ____ structure.

Which protein is an important component of hair and feathers?

An amino acid that forms a solution with a pH of 3.0 as it is dissolved in distilled water has a side chain with what functional group?

The tertiary structure of myoglobin reveals that nonpolar portions are primarily on the ____ of the molecule.

Although the common amino acids all have accepted standard names,they can also be named using the IUPAC organic chemical nomenclature system.Below is the structure for the simplest amino acid,glycine.What would be its IUPAC name?

The following amino acid would be classified as neutral,nonpolar.

Which of the following is a function of proteins?

The figure below shows a portion of what type of secondary protein structure?

An ion which is especially effective at causing protein denaturation is Hg2+.

What bonding forces are responsible for the secondary structure of a protein?

The biologically important peptides are formed from alpha amino acids.

Glycoproteins are a combination of protein and _____ .

Protein denaturation results in a disruption of the

Which of the following is the structure for alanine?

Some proteins owe their functions to the three dimensional shape they have; what is responsible for holding the shape of a protein?

Sickle cell anemia is a disease that results from a protein defect related to which of the following structures?

The major difference between normal hemoglobin and that of sickle cell anemia is

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An ion which is especially effective at causing protein denaturation is Hg²⁺.