Question 1

Having the gene for sickle cell hemoglobin gives an individual enhanced immunity against which of the following?

Accepted Answer

A)  flu 
B)  malaria 
C)  polio 
D)  sleeping sickness 
A)  flu 
B)  malaria 
C)  polio 
D)  sleeping sickness

Question 2

In which of the following proteins is the α-helix the predominant structure?

Accepted Answer

A)  keratin 
B)  silk 
C)  both a and b 
D)  neither a nor b 
A)  keratin 
B)  silk 
C)  both a and b 
D)  neither a nor b

Question 3

Which of the following side chains are hydrophobic?

Accepted Answer

A)  acidic 
B)  nonpolar 
C)  polar but neutral 
D)  none of these 
A)  acidic 
B)  nonpolar 
C)  polar but neutral 
D)  none of these

Question 4

How many protein chains make up hemoglobin?

Accepted Answer

A)  1 
B)  2 
C)  3 
D)  4 
A)  1 
B)  2 
C)  3 
D)  4

Question 5

Approximately how many different proteins are found in the human body?

Accepted Answer

A)  900 
B)  9000 
C)  100,000 
D)  1,000,000 
A)  900 
B)  9000 
C)  100,000 
D)  1,000,000

Question 6

How many atoms form the backbone of the repeat unit of a protein?

Accepted Answer

A)  2 
B)  4 
C)  6 
D)  8 
A)  2 
B)  4 
C)  6 
D)  8

Question 7

Zn2+ is required for a number of proteins. Which of the following describes the complex formed between this ion and the involved proteins?

Accepted Answer

A)  There are six coordinate covalent bonds in the structure. 
B)  Zn2+ as eight d electrons. 
C)  Zn probably does not obey the 18-electron rule. 
D)  The geometry about the zinc ion is tetrahedral. 
A)  There are six coordinate covalent bonds in the structure. 
B)  Zn2+ as eight d electrons. 
C)  Zn probably does not obey the 18-electron rule. 
D)  The geometry about the zinc ion is tetrahedral.

Question 8

A conjugated protein must contain which of the following?

Accepted Answer

A)  a metal ion 
B)  a polysaccharide 
C)  a non-amino acid portion 
D)  all of these 
A)  a metal ion 
B)  a polysaccharide 
C)  a non-amino acid portion 
D)  all of these

Question 9

Which functional group is involved in linking together the amino acids of proteins?

Accepted Answer

A)  amine 
B)  anhydride 
C)  carbonyl 
D)  carboxyl 
A)  amine 
B)  anhydride 
C)  carbonyl 
D)  carboxyl

Question 10

What is the minimum number of carbon atoms in an α-amino acid?

Accepted Answer

A)  1 
B)  2 
C)  3 
D)  4 
A)  1 
B)  2 
C)  3 
D)  4

Question 11

How is the tripeptide shown designated?

Accepted Answer

A)  Ala-Cys-Asp 
B)  Ala-Cys-Glu 
C)  Asp-Cys-Ala 
D)  Glu-Cys-Ala 
A)  Ala-Cys-Asp 
B)  Ala-Cys-Glu 
C)  Asp-Cys-Ala 
D)  Glu-Cys-Ala

Question 12

In the tertiary structure of proteins which amino acid is involved in forming covalent bonds?

Accepted Answer

A)  alanine 
B)  aspartic acid 
C)  cysteine 
D)  tryptophan 
A)  alanine 
B)  aspartic acid 
C)  cysteine 
D)  tryptophan

Question 13

From which amino acid is tyrosine normally derived?

Accepted Answer

A)  cysteine 
B)  phenylalanine 
C)  tryptophan 
D)  valine 
A)  cysteine 
B)  phenylalanine 
C)  tryptophan 
D)  valine

Question 14

Which of the following is true of integral membrane proteins?

Accepted Answer

A)  Both the inner and outer surfaces involve primarily hydrophilic groups. 
B)  Both the inner and outer surfaces involve primarily hydrophobic groups. 
C)  The outer surface involves primarily hydrophilic groups and most of the hydrophobic groups must turn inward. 
D)  The outer surface involves primarily hydrophobic groups and most of the hydrophilic groups must turn inward. 
A)  Both the inner and outer surfaces involve primarily hydrophilic groups. 
B)  Both the inner and outer surfaces involve primarily hydrophobic groups. 
C)  The outer surface involves primarily hydrophilic groups and most of the hydrophobic groups must turn inward. 
D)  The outer surface involves primarily hydrophobic groups and most of the hydrophilic groups must turn inward.

Question 15

How many valence electrons do transition metals try to achieve to gain greater stability?

Accepted Answer

A)  2 
B)  8 
C)  18 
D)  32 
A)  2 
B)  8 
C)  18 
D)  32

Question 16

Which amino acid can be found in proteins in both its protonated and unprotonated forms?

Accepted Answer

A)  alanine 
B)  glycine 
C)  histidine 
D)  phenylalanine 
A)  alanine 
B)  glycine 
C)  histidine 
D)  phenylalanine

Question 17

Which of the following amino acids is not optically active?

Accepted Answer

A)  alanine 
B)  glycine 
C)  tryptophan 
D)  None of these, they are all optically active. 
A)  alanine 
B)  glycine 
C)  tryptophan 
D)  None of these, they are all optically active.

Question 18

Which of the following proteins is a hormone?

Accepted Answer

A)  casein 
B)  hemoglobin 
C)  insulin 
D)  all of these 
A)  casein 
B)  hemoglobin 
C)  insulin 
D)  all of these

Question 19

Which of the following is a type of secondary structure?

Accepted Answer

A)  α-helix 
B)  β-pleated sheet 
C)  both a and b 
D)  neither a nor b 
A)  α-helix 
B)  β-pleated sheet 
C)  both a and b 
D)  neither a nor b

Question 20

How is the tripeptide designated?

Accepted Answer

A)  Ala-Cys-Asp 
B)  Ala-Cys-Glu 
C)  Asp-Cys-Ala 
D)  Glu-Cys-Ala 
A)  Ala-Cys-Asp 
B)  Ala-Cys-Glu 
C)  Asp-Cys-Ala 
D)  Glu-Cys-Ala

Exam 22: Proteins

Having the gene for sickle cell hemoglobin gives an individual enhanced immunity against which of the following?

In which of the following proteins is the α-helix the predominant structure?

Which of the following side chains are hydrophobic?

How many protein chains make up hemoglobin?

Approximately how many different proteins are found in the human body?

How many atoms form the backbone of the repeat unit of a protein?

Zn2+ is required for a number of proteins. Which of the following describes the complex formed between this ion and the involved proteins?

A conjugated protein must contain which of the following?

Which functional group is involved in linking together the amino acids of proteins?

What is the minimum number of carbon atoms in an α-amino acid?

How is the tripeptide shown designated?

In the tertiary structure of proteins which amino acid is involved in forming covalent bonds?

From which amino acid is tyrosine normally derived?

Which of the following is true of integral membrane proteins?

How many valence electrons do transition metals try to achieve to gain greater stability?

Which amino acid can be found in proteins in both its protonated and unprotonated forms?

Which of the following amino acids is not optically active?

Which of the following proteins is a hormone?

Which of the following is a type of secondary structure?

How is the tripeptide designated?

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Zn²⁺ is required for a number of proteins. Which of the following describes the complex formed between this ion and the involved proteins?