Question 1

Which of the following is the structure for tryptophan?

Accepted Answer

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

Question 2

A denatured protein

Accepted Answer

A) has undergone a process which changes the D isomer to an L isomer. 
B) has the same shape but lacks all cross links. 
C) does not have the function it previously had. 
D) is a stereoisomer of the original form.. 
A) has undergone a process which changes the D isomer to an L isomer. 
B) has the same shape but lacks all cross links. 
C) does not have the function it previously had. 
D) is a stereoisomer of the original form..

Question 3

A disulfide bridge within a protein molecule is different from the hydrogen bonding within the molecule because the disulfide bridge is a stronger bond than the hydrogen bond.

Accepted Answer

A) True 
 B)False

Question 4

Consider the tertiary structure of a protein containing two peptides with the segments shown below. What type(s)of interaction(s)would be possible between the side chains?

Accepted Answer

A) hydrogen bonding 
B) hydrophobic interactions 
C) salt bridges 
D) all of these 
A) hydrogen bonding 
B) hydrophobic interactions 
C) salt bridges 
D) all of these

Question 5

An alpha amino acid contains

Accepted Answer

A) an amino group on the carbon next to the carboxylate group. 
B) two amino groups. 
C) two carboxyl groups. 
D) an amino group on the end carbon. 
A) an amino group on the carbon next to the carboxylate group. 
B) two amino groups. 
C) two carboxyl groups. 
D) an amino group on the end carbon.

Question 6

The following amino acid has a polar side chain.

Accepted Answer

A) True 
 B)False

Question 7

If the following compound were completely hydrolyzed, how many amino acids could be produced?

Accepted Answer

A) 3 
B) 4 
C) 5 
D) 6 
A) 3 
B) 4 
C) 5 
D) 6

Question 8

Whipping of egg white involves protein denaturation.

Accepted Answer

A) True 
 B)False

Question 9

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 10

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 11

Which of the following would not denature an egg?

Accepted Answer

A) heat 
B) strong acid 
C) water 
D) UV light 
A) heat 
B) strong acid 
C) water 
D) UV light

Question 12

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 13

How many different tripeptides could be formed by 1 of each of the following amino acids? [   lysine     histidine     aspartate   ]

Accepted Answer

A) 1 
B) 3 
C) 6 
D) 9 
A) 1 
B) 3 
C) 6 
D) 9

Question 14

α -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 15

Which of the following is the functional group of amino acids that differentiates them from other acids?

Accepted Answer

A) -COOH 
B) -CH=CH- 
C) -NH2 
D) All of them 
A) -COOH 
B) -CH=CH- 
C) -NH2 
D) All of them

Question 16

The formation of a disulfide bond between two cysteine molecules requires oxidation.

Accepted Answer

A) True 
 B)False

Question 17

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 18

What is the name of the following amino acid?

Accepted Answer

A) alanine 
B) tyrosine 
C) phenylalanine 
D) proline 
A) alanine 
B) tyrosine 
C) phenylalanine 
D) proline

Question 19

It is considered important to suppress ones appetite when dieting.  Which nutrient is considered as having the greatest ability to satisfy hunger?

Accepted Answer

A) fats 
B) carbohydrates 
C) protein 
D) vitamins 
A) fats 
B) carbohydrates 
C) protein 
D) vitamins

Question 20

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

Accepted Answer

A) True 
 B)False

Exam 19: Proteins

Which of the following is the structure for tryptophan?

A denatured protein

A disulfide bridge within a protein molecule is different from the hydrogen bonding within the molecule because the disulfide bridge is a stronger bond than the hydrogen bond.

Consider the tertiary structure of a protein containing two peptides with the segments shown below. What type(s)of interaction(s)would be possible between the side chains?

An alpha amino acid contains

The following amino acid has a polar side chain.

If the following compound were completely hydrolyzed, how many amino acids could be produced?

Whipping of egg white involves protein denaturation.

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

How many peptide bonds are in the following structural formula?

Which of the following would not denature an egg?

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

How many different tripeptides could be formed by 1 of each of the following amino acids? [ lysine histidine aspartate ]

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

Which of the following is the functional group of amino acids that differentiates them from other acids?

The formation of a disulfide bond between two cysteine molecules requires oxidation.

Glycoproteins are a combination of protein and _____ .

What is the name of the following amino acid?

It is considered important to suppress ones appetite when dieting. Which nutrient is considered as having the greatest ability to satisfy hunger?

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

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

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