Question 1

Using the three-letter abbreviations for amino acids,following peptide would be _____ .

Accepted Answer

A) Ala-Phe-Leu 
B) Leu-Phe-Ala 
C) Ala-Phe-Val 
D) Gly-Phe-Ile 
A) Ala-Phe-Leu 
B) Leu-Phe-Ala 
C) Ala-Phe-Val 
D) Gly-Phe-Ile

Question 2

Which of the following is the best representation of a segment of a protein chain?

Accepted Answer

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

Question 3

If a protein is made up of primarily of long,rod-shaped or string-like structures,it would be considered a ____ protein.

Accepted Answer

A) conjugated 
B) globular 
C) fibrous 
D) enzymatic 
A) conjugated 
B) globular 
C) fibrous 
D) enzymatic

Question 4

Foreign substances that stimulate an immune response are called _____ .

Accepted Answer

A) antigens 
B) antibodies 
C) immunoglobolins 
D) lymphocytes 
A) antigens 
B) antibodies 
C) immunoglobolins 
D) lymphocytes

Question 5

Proteins can be classified based on _____ .

Accepted Answer

A) function. 
B) shape. 
C) composition. 
D) all of these 
A) function. 
B) shape. 
C) composition. 
D) all of these

Question 6

How many peptide bonds are in the following structural formula?

Accepted Answer

A) 2 
B) 3 
C) 4 
D) 5 
A) 2 
B) 3 
C) 4 
D) 5

Question 7

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 8

Which of the following is the best representation of glutamate in an aqueous solution at pH = 1?

Accepted Answer

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

Question 9

$\alpha$-Keratin,the protein of hair and skin,has extensive sections with the ____ secondary structure.

Accepted Answer

A) beta-pleated sheet 
B) alpha-helix 
C) alpha-pleated sheet 
D) beta-helix 
A) beta-pleated sheet 
B) alpha-helix 
C) alpha-pleated sheet 
D) beta-helix

Question 10

The structure of human insulin

Accepted Answer

A) includes disulfide bridges averaging every 6 amino acid pairs. 
B) includes both an alpha and a beta helix. 
C) is characterized by being a large molecule with a complex three-dimensional structure. 
D) None of the above. 
A) includes disulfide bridges averaging every 6 amino acid pairs. 
B) includes both an alpha and a beta helix. 
C) is characterized by being a large molecule with a complex three-dimensional structure. 
D) None of the above.

Question 11

What type of interaction forms when two nonpolar side chains are in close proximity?

Accepted Answer

A) disulfide bridge 
B) hydrogen bond 
C) hydrophilic interaction 
D) hydrophobic interaction 
A) disulfide bridge 
B) hydrogen bond 
C) hydrophilic interaction 
D) hydrophobic interaction

Question 12

Peptide bonds usually are not cleaved in denaturation.

Accepted Answer

A) True 
 B)False

Question 13

Which of the following is the best representation of the zwitterion for glycine in a neutral aqueous solution?

Accepted Answer

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

Question 14

Which of the following is the best representation of an lysine in an aqueous solution at pH = 12?

Accepted Answer

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

Question 15

The non-amino acid parts of conjugated proteins are called _____ .

Accepted Answer

A) side chains 
B) prosthetic groups 
C) zwitterions 
D) tertiary structures 
A) side chains 
B) prosthetic groups 
C) zwitterions 
D) tertiary structures

Question 16

The association of several protein chains into a larger structure as in the case of hemoglobin is an example of ____ structure.

Accepted Answer

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

Question 17

Proteins can be produced by using any one of the naturally occurring amino acids.

Accepted Answer

A) True 
 B)False

Question 18

All twenty common amino acids contain at least one chiral carbon.

Accepted Answer

A) True 
 B)False

Question 19

The amino acid shown below correctly labeled.

Accepted Answer

A) True 
 B)False

Question 20

The protein responsible for the mechanical strength of skin in mammals is?

Accepted Answer

A) collagen 
B) keratin 
C) hemoglobin 
D) myosin 
A) collagen 
B) keratin 
C) hemoglobin 
D) myosin

Exam 19: Proteins

Using the three-letter abbreviations for amino acids,following peptide would be _____ .

Which of the following is the best representation of a segment of a protein chain?

If a protein is made up of primarily of long,rod-shaped or string-like structures,it would be considered a ____ protein.

Foreign substances that stimulate an immune response are called _____ .

Proteins can be classified based on _____ .

How many peptide bonds are in the following structural formula?

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

Which of the following is the best representation of glutamate in an aqueous solution at pH = 1?

α\alphaα -Keratin,the protein of hair and skin,has extensive sections with the ____ secondary structure.

The structure of human insulin

What type of interaction forms when two nonpolar side chains are in close proximity?

Peptide bonds usually are not cleaved in denaturation.

Which of the following is the best representation of the zwitterion for glycine in a neutral aqueous solution?

Which of the following is the best representation of an lysine in an aqueous solution at pH = 12?

The non-amino acid parts of conjugated proteins are called _____ .

The association of several protein chains into a larger structure as in the case of hemoglobin is an example of ____ structure.

Proteins can be produced by using any one of the naturally occurring amino acids.

All twenty common amino acids contain at least one chiral carbon.

The amino acid shown below correctly labeled.

The protein responsible for the mechanical strength of skin in mammals is?

Matter, measurements, and Calculations

Atoms and Molecules

Electronic Structure and the Periodic Law

Forces Between Particles

Chemical Reactions

The States of Matter

Solutions and Colloids

Reaction Rates and Equilibrium

Acids, bases, and Salts

Radioactivity and Nuclear Processes

Organic Compounds: Alkanes

Unsaturated Hydrocarbons

Alcohols, phenols, and Ethers

Aldehydes and Ketones

Carboxylic Acids and Esters

Amines and Amides

Carbohydrates

Lipids

Enzymes

Nucleic Acids and Protein Synthesis

Nutrition and Energy for Life

Carbohydrate Metabolism

Lipid and Amino Acid Metabolism

Body Fluids

Filters

$\alpha$ -Keratin,the protein of hair and skin,has extensive sections with the ____ secondary structure.