Question 1

Lead ions disrupt hydrophobic interactions.

Accepted Answer

A) True 
 B)False

Question 2

The protein that transports oxygen in the blood is ________.

Accepted Answer

The answer of The protein that transports oxygen in the...

Question 3

Wool is primarily made up of

Accepted Answer

A) protein. 
B) carbohydrate. 
C) globin. 
D) triacylglycerols. 
E) enkephalin. 
A) protein. 
B) carbohydrate. 
C) globin. 
D) triacylglycerols. 
E) enkephalin.

Question 4

In a typical amino acid zwitterion, the carboxylate end is

Accepted Answer

A) positively charged. 
B) negatively charged. 
C) neutral. 
D) soluble in a nonpolar solvent. 
E) attached to an amine. 
A) positively charged. 
B) negatively charged. 
C) neutral. 
D) soluble in a nonpolar solvent. 
E) attached to an amine.

Question 5

Glycine is the only naturally occurring amino acid that is

Accepted Answer

A) negatively charged. 
B) positively charged. 
C) neutral. 
D) in the L- form. 
E) achiral. 
A) negatively charged. 
B) positively charged. 
C) neutral. 
D) in the L- form. 
E) achiral.

Question 6

Which of the following is a secondary protein structure?

Accepted Answer

A) α helix 
B) Ser-Met-Ala-Gly-Ile 
C) disulfide bond 
D) salt bridges 
E) hydrophobic interactions 
A) α helix 
B) Ser-Met-Ala-Gly-Ile 
C) disulfide bond 
D) salt bridges 
E) hydrophobic interactions

Question 7

A completely vegetarian diet will contain all the essential amino acids if it includes

Accepted Answer

A) wheat and rice. 
B) rice and beans. 
C) almonds and walnuts. 
D) corn and beans. 
E) wheat and corn. 
A) wheat and rice. 
B) rice and beans. 
C) almonds and walnuts. 
D) corn and beans. 
E) wheat and corn.

Question 8

Electrophoresis is a laboratory technique for separating amino acids using their different ________.

Accepted Answer

The answer of Electrophoresis is a laboratory technique for separating...

Question 9

In digestion, proteins are broken down into amino acids by a(n) ________ reaction.

Accepted Answer

A) saponification 
B) reduction 
C) hydrolysis 
D) oxidation 
E) denaturation 
A) saponification 
B) reduction 
C) hydrolysis 
D) oxidation 
E) denaturation

Question 10

The peptide hormone that regulates uterine contractions during labor is ________.

Accepted Answer

A) oxytocin 
B) vasopressin 
C) myoglobin 
D) an endorphin 
E) an enkephalin 
A) oxytocin 
B) vasopressin 
C) myoglobin 
D) an endorphin 
E) an enkephalin

Question 11

Which of the following is the correct structure for Ser-Ala-Asp? The appropriate side chains look like this.

Accepted Answer

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

Question 12

The following amino acid R group chain is

Accepted Answer

A) polar. 
B) hydrophobic. 
C) hydrophilic. 
D) acidic. 
E) basic. 
A) polar. 
B) hydrophobic. 
C) hydrophilic. 
D) acidic. 
E) basic.

Question 13

What process occurs when heat, acids, bases, and heavy metal ions cause a loss of biological function of a protein?

Accepted Answer

A) denaturation 
B) saponification 
C) hydrogenation 
D) amidation 
E) esterification 
A) denaturation 
B) saponification 
C) hydrogenation 
D) amidation 
E) esterification

Question 14

Proteins that stimulate immune response are known as ________.

Accepted Answer

The answer of Proteins that stimulate immune response are known...

Question 15

In the β-pleated sheet secondary structure of a protein, two or more amino acid sequences in separate parts of the protein are held together

Accepted Answer

A) in a coil, by hydrogen bonding. 
B) in random order, due to hydrophobic interactions. 
C) in a triple helix. 
D) in a double helix. 
E) in a zig-zag conformation, by hydrogen bonding. 
A) in a coil, by hydrogen bonding. 
B) in random order, due to hydrophobic interactions. 
C) in a triple helix. 
D) in a double helix. 
E) in a zig-zag conformation, by hydrogen bonding.

Question 16

The R group for serine is - CH2OH. As a zwitterion, serine has the structural formula

Accepted Answer

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

Question 17

In an enzyme, the polypeptide chain folds into a compact shape known as the ________ structure.

Accepted Answer

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

Question 18

Circle the peptide bond in this structure.

Accepted Answer

The answer of Circle the peptide bond in this structure....

Question 19

At what pH would you expect valine, an amino acid with a neutral R group, to be in the zwitterionic form?

Accepted Answer

A) 1 
B) 4 
C) 6 
D) 10 
E) 14 
A) 1 
B) 4 
C) 6 
D) 10 
E) 14

Question 20

Heavy metals denature proteins by

Accepted Answer

A) releasing amino acids. 
B) disrupting hydrophobic interactions. 
C) changing the pH of the protein solution. 
D) changing the temperature of the protein solution. 
E) disrupting disulfide bonds. 
A) releasing amino acids. 
B) disrupting hydrophobic interactions. 
C) changing the pH of the protein solution. 
D) changing the temperature of the protein solution. 
E) disrupting disulfide bonds.

Exam 19: Amino Acids and Proteins

Lead ions disrupt hydrophobic interactions.

The protein that transports oxygen in the blood is ________.

Wool is primarily made up of

In a typical amino acid zwitterion, the carboxylate end is

Glycine is the only naturally occurring amino acid that is

Which of the following is a secondary protein structure?

A completely vegetarian diet will contain all the essential amino acids if it includes

Electrophoresis is a laboratory technique for separating amino acids using their different ________.

In digestion, proteins are broken down into amino acids by a(n) ________ reaction.

The peptide hormone that regulates uterine contractions during labor is ________.

Which of the following is the correct structure for Ser-Ala-Asp? The appropriate side chains look like this.

The following amino acid R group chain is

What process occurs when heat, acids, bases, and heavy metal ions cause a loss of biological function of a protein?

Proteins that stimulate immune response are known as ________.

In the β-pleated sheet secondary structure of a protein, two or more amino acid sequences in separate parts of the protein are held together

The R group for serine is - CH2OH. As a zwitterion, serine has the structural formula

In an enzyme, the polypeptide chain folds into a compact shape known as the ________ structure.

Circle the peptide bond in this structure.

At what pH would you expect valine, an amino acid with a neutral R group, to be in the zwitterionic form?

Heavy metals denature proteins by

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The R group for serine is - CH₂OH. As a zwitterion, serine has the structural formula