Question 1

Hemoglobin is a transport protein.

Accepted Answer

A) True 
 B)False  True

Question 2

Classify each protein by function.
-the structural level achieved when hydrogen bonds form between the carboxyl group of one amino acid and the amino group of a different amino acid

Accepted Answer

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

Question 3

Which of the following would be most likely to be deficient in at least one essential amino acid?

Accepted Answer

A)  eggs 
B)  milk 
C)  beans 
D)  steak 
E)  ham 
A)  eggs 
B)  milk 
C)  beans 
D)  steak 
E)  ham C

Question 4

Classify each protein by function.
-actin in muscle

Accepted Answer

A)  protection 
B)  transport 
C)  catalytic 
D)  structural 
E)  contractile 
A)  protection 
B)  transport 
C)  catalytic 
D)  structural 
E)  contractile

Question 5

The side chain for histidine is classified as a __________ R group.

Accepted Answer

A)  basic 
B)  neutral 
C)  acidic 
D)  nonpolar 
E)  polar 
A)  basic 
B)  neutral 
C)  acidic 
D)  nonpolar 
E)  polar

Question 6

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 7

Heat denatures a protein by disrupting

Accepted Answer

A)  ionic bonds and peptide bonds. 
B)  hydrophobic bonds and hydrogen bonds. 
C)  peptide bonds and hydrophobic bonds. 
D)  disulfide bonds and peptide bonds. 
E)  hydrogen bonds and disulfide bonds. 
A)  ionic bonds and peptide bonds. 
B)  hydrophobic bonds and hydrogen bonds. 
C)  peptide bonds and hydrophobic bonds. 
D)  disulfide bonds and peptide bonds. 
E)  hydrogen bonds and disulfide bonds.

Question 8

Hemoglobin has a total of __________ protein chains in its quaternary structure.

Accepted Answer

A)  one 
B)  two 
C)  three 
D)  four 
E)  five 
A)  one 
B)  two 
C)  three 
D)  four 
E)  five

Question 9

The α helix of the secondary structure of a protein is held together by __________ between two widely separated parts of a protein chain.

Accepted Answer

A)  hydrogen bonds 
B)  disulfide bridges 
C)  salt bridges 
D)  hydrophilic interactions 
E)  hydrophobic interactions 
A)  hydrogen bonds 
B)  disulfide bridges 
C)  salt bridges 
D)  hydrophilic interactions 
E)  hydrophobic interactions

Question 10

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 11

Insulin is a transport protein.

Accepted Answer

A) True 
 B)False

Question 12

Classify each protein by function.
-antibodies

Accepted Answer

A) protection 
B) transport 
C) catalytic 
D) structural 
E) contractile 
A) protection 
B) transport 
C) catalytic 
D) structural 
E) contractile

Question 13

Classify each protein by function.
-trypsin for the hydrolysis of protein

Accepted Answer

A) protection 
B) transport 
C) catalytic 
D) structural 
E) contractile 
A) protection 
B) transport 
C) catalytic 
D) structural 
E) contractile

Question 14

The fibrous protein responsible for the structure of hair and wool is

Accepted Answer

A)  keratin. 
B)  collagen. 
C)  endorphin. 
D)  myosin. 
E)  casein. 
A)  keratin. 
B)  collagen. 
C)  endorphin. 
D)  myosin. 
E)  casein.

Question 15

Methionine is an amino acid that contains

Accepted Answer

A)  a sulfur atom. 
B)  a chlorine atom. 
C)  a sodium atom. 
D)  a phenyl ring. 
E)  a heterocyclic ring. 
A)  a sulfur atom. 
B)  a chlorine atom. 
C)  a sodium atom. 
D)  a phenyl ring. 
E)  a heterocyclic ring.

Question 16

Which of the following is the correct structure for Ser-Ala-Asp? The appropriate side chains look like this. Ala: - CH3; Ser: - CH?OH; Asp: $$\begin{array} { c } 
\mathrm { O } \
\mathrm { || } \
- \mathrm { CH } _ { 2 } \mathrm { COH }
\end{array}$$

Accepted Answer

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

Question 17

At a pH < 5, the zwitterion for alanine (pI = 6) will have

Accepted Answer

A)  a net positive charge. 
B)  a net negative charge. 
C)  an overall charge of zero. 
D)  low solubility in water. 
E)  a negative charge on the carboxyl group. 
A)  a net positive charge. 
B)  a net negative charge. 
C)  an overall charge of zero. 
D)  low solubility in water. 
E)  a negative charge on the carboxyl group.

Question 18

A peptide bond contains which kind of functional group?

Accepted Answer

A)  alcohol 
B)  amine 
C)  amide 
D)  carboxylic acid 
E)  ketone 
A)  alcohol 
B)  amine 
C)  amide 
D)  carboxylic acid 
E)  ketone

Question 19

What kinds of interactions are NOT part of tertiary protein structure?

Accepted Answer

A)  peptide bonds 
B)  disulfide bonds 
C)  hydrophilic interactions 
D)  salt bridges 
E)  hydrophobic interactions 
A)  peptide bonds 
B)  disulfide bonds 
C)  hydrophilic interactions 
D)  salt bridges 
E)  hydrophobic interactions

Question 20

A basic amino acid has an R group that contains

Accepted Answer

A)  an amine group. 
B)  a carboxyl group. 
C)  a methyl group. 
D)  an alcohol group. 
E)  a thiol group. 
A)  an amine group. 
B)  a carboxyl group. 
C)  a methyl group. 
D)  an alcohol group. 
E)  a thiol group.

Exam 19: Amino Acids and Proteins

Hemoglobin is a transport protein.

Classify each protein by function. -the structural level achieved when hydrogen bonds form between the carboxyl group of one amino acid and the amino group of a different amino acid

Which of the following would be most likely to be deficient in at least one essential amino acid?

Classify each protein by function. -actin in muscle

The side chain for histidine is classified as a __________ R group.

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

Heat denatures a protein by disrupting

Hemoglobin has a total of __________ protein chains in its quaternary structure.

The α helix of the secondary structure of a protein is held together by __________ between two widely separated parts of a protein chain.

Which of the following is a secondary protein structure?

Insulin is a transport protein.

Classify each protein by function. -antibodies

Classify each protein by function. -trypsin for the hydrolysis of protein

The fibrous protein responsible for the structure of hair and wool is

Methionine is an amino acid that contains

Which of the following is the correct structure for Ser-Ala-Asp? The appropriate side chains look like this. Ala: - CH3; Ser: - CH?OH; Asp: -

At a pH < 5, the zwitterion for alanine (pI = 6) will have

A peptide bond contains which kind of functional group?

What kinds of interactions are NOT part of tertiary protein structure?

A basic amino acid has an R group that contains

Chemistry and Measurements

Energy and Matter

Atoms and Elements

Nuclear Chemistry

Compounds and Their Bonds

Chemical Reactions and Quantities

Gases

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Reaction Rates and Chemical Equilibrium

Acids and Bases

Introduction to Organic Chemistry: Alkanes

Alkenes, Alkynes, and Aromatic Compounds

Alcohols, Phenols, Thiols, and Ethers

Aldehydes, Ketones, and Chiral Molecules

Carbohydrates

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Enzymes and Vitamins

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Metabolic Pathways for Carbohydrates

Metabolism and Energy Production

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Filters

Which of the following is the correct structure for Ser-Ala-Asp? The appropriate side chains look like this. Ala: - CH₃; Ser: - CH?OH; Asp: -