Question 1

Which R group would most likely be found in a hydrophobic area of the tertiary structure of a globular protein?

Accepted Answer

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

Question 2

The molecules to which an enzyme binds are called the ________.

Accepted Answer

The answer of The molecules to which an enzyme binds...

Question 3

Match between columns
                        Premises: the temporary combination of an enzyme with the compound on which it acts
the portion of an enzyme molecule where catalytic activity occurs
one theory that accounts for the unusual specificity of an enzyme

Accepted Answer

The Answer of active site and enzyme-substrate complex and lock-and-key is...

Question 4

In the peptide GLVIW,the C-terminal end is ________.

Accepted Answer

A) tryptophan 
B) serotonin 
C) glycine 
D) glycerine 
E) alanine 
A) tryptophan 
B) serotonin 
C) glycine 
D) glycerine 
E) alanine

Question 5

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 6

A noncompetitive inhibitor has a structure that ________.

Accepted Answer

A) does not resemble the substrate structure 
B) resembles the active site of the enzyme 
C) can bind to the active site of the enzyme 
D) does not interfere with the enzyme-substrate complex formation 
E) causes a change in the shape of the substrate 
A) does not resemble the substrate structure 
B) resembles the active site of the enzyme 
C) can bind to the active site of the enzyme 
D) does not interfere with the enzyme-substrate complex formation 
E) causes a change in the shape of the substrate

Question 7

The purpose of the many chemical reactions in our bodies is to ________.

Accepted Answer

A) store chemical energy in the body for future use 
B) produce the amino acids 
C) produce the lipids 
D) release chemical energy for the production of macromolecules 
E) all of the above 
A) store chemical energy in the body for future use 
B) produce the amino acids 
C) produce the lipids 
D) release chemical energy for the production of macromolecules 
E) all of the above

Question 8

Enzymes that catalyze the same reactions but have slightly different structures are called ________.

Accepted Answer

A) coenzymes 
B) cofactors 
C) isoenzymes 
D) competitive 
E) noncompetitive 
A) coenzymes 
B) cofactors 
C) isoenzymes 
D) competitive 
E) noncompetitive

Question 9

The peptide bonds that link amino acids in a protein are ________.

Accepted Answer

A) ester bonds 
B) ether bonds 
C) amide bonds 
D) glycosidic bonds 
E) sulfide bonds 
A) ester bonds 
B) ether bonds 
C) amide bonds 
D) glycosidic bonds 
E) sulfide bonds

Question 10

The secondary structure of collagen consists of ________.

Accepted Answer

A) single α-helix strands 
B) double α-helix strands 
C) many α-helixes wound into fibrils 
D) a braided triple helix 
E) many glycoside links 
A) single α-helix strands 
B) double α-helix strands 
C) many α-helixes wound into fibrils 
D) a braided triple helix 
E) many glycoside links

Question 11

Hemoglobin is an example of a protein with ________.

Accepted Answer

A) primary structure only 
B) a single polypeptide chain 
C) a globular structure 
D) primarily a β-pleated sheet structure 
E) primarily an α helix structure 
A) primary structure only 
B) a single polypeptide chain 
C) a globular structure 
D) primarily a β-pleated sheet structure 
E) primarily an α helix structure

Question 12

The function of the enzyme-substrate complex is to provide an alternative reaction pathway that ________.

Accepted Answer

A) lowers the energy of the products 
B) lowers the energy of the substrate 
C) changes the concentration of the substrate 
D) lowers the activation energy for the reaction 
E) changes the possible product formed 
A) lowers the energy of the products 
B) lowers the energy of the substrate 
C) changes the concentration of the substrate 
D) lowers the activation energy for the reaction 
E) changes the possible product formed

Question 13

At what pH would you expect valine,with a pI of 6.0,to have a 1+ charge?

Accepted Answer

A) 1.0 
B) 6.0 
C) 7.0 
D) 10.0 
E) 14.0 
A) 1.0 
B) 6.0 
C) 7.0 
D) 10.0 
E) 14.0

Question 14

What is the structural formula of glutamic acid (pI = 3.2)at pH = 1?

Accepted Answer

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

Question 15

Proteins that stimulate immune response are known as ________.

Accepted Answer

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

Question 16

To what main class of enzymes does the enzyme that catalyzes the following reaction belong?

Accepted Answer

A) oxidoreductase 
B) transferase 
C) hydrolase 
D) lyase 
E) isomerase 
A) oxidoreductase 
B) transferase 
C) hydrolase 
D) lyase 
E) isomerase

Question 17

Match between columns
                        Premises: increasing the concentration of maltase (enzyme)when the enzyme is saturated with substrate
lowering the pH to 1.0
raising the pH to 11.0
adjusting the temperature to the optimum temperature
decreasing the concentration of maltose

Accepted Answer

The Answer of decreases and increases and has no effect is...

Question 18

To what main class of enzymes does the enzyme that catalyzes the conversion of lactose to galactose and glucose belong?

Accepted Answer

A) oxidoreductase 
B) transferase 
C) hydrolase 
D) lyase 
E) isomerase 
A) oxidoreductase 
B) transferase 
C) hydrolase 
D) lyase 
E) isomerase

Question 19

The optimum pH for the activity of pepsin is about ________.

Accepted Answer

A) 2.0 
B) 4.0 
C) 6.5 
D) 7.4 
E) 7.6 
A) 2.0 
B) 4.0 
C) 6.5 
D) 7.4 
E) 7.6

Question 20

A competitive inhibitor is one that ________.

Accepted Answer

A) binds to the enzyme at a site far from the active site 
B) binds to the active site in place of the substrate 
C) destroys the substrate 
D) binds to the allosteric site on an enzyme 
E) forms a complex with the substrate 
A) binds to the enzyme at a site far from the active site 
B) binds to the active site in place of the substrate 
C) destroys the substrate 
D) binds to the allosteric site on an enzyme 
E) forms a complex with the substrate

Which R group would most likely be found in a hydrophobic area of the tertiary structure of a globular protein?

The molecules to which an enzyme binds are called the ________.

In the peptide GLVIW,the C-terminal end is ________.

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

A noncompetitive inhibitor has a structure that ________.

The purpose of the many chemical reactions in our bodies is to ________.

Enzymes that catalyze the same reactions but have slightly different structures are called ________.

The peptide bonds that link amino acids in a protein are ________.

The secondary structure of collagen consists of ________.

Hemoglobin is an example of a protein with ________.

The function of the enzyme-substrate complex is to provide an alternative reaction pathway that ________.

At what pH would you expect valine,with a pI of 6.0,to have a 1+ charge?

What is the structural formula of glutamic acid (pI = 3.2)at pH = 1?

Proteins that stimulate immune response are known as ________.

To what main class of enzymes does the enzyme that catalyzes the following reaction belong?

To what main class of enzymes does the enzyme that catalyzes the conversion of lactose to galactose and glucose belong?

The optimum pH for the activity of pepsin is about ________.

A competitive inhibitor is one that ________.

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Introduction to Organic Chemistry: Hydrocarbons

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Exam 16: Amino Acids, Proteins, and Enzymes

Which R group would most likely be found in a hydrophobic area of the tertiary structure of a globular protein?

The molecules to which an enzyme binds are called the ________.

In the peptide GLVIW,the C-terminal end is ________.

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

A noncompetitive inhibitor has a structure that ________.

The purpose of the many chemical reactions in our bodies is to ________.

Enzymes that catalyze the same reactions but have slightly different structures are called ________.

The peptide bonds that link amino acids in a protein are ________.

The secondary structure of collagen consists of ________.

Hemoglobin is an example of a protein with ________.

The function of the enzyme-substrate complex is to provide an alternative reaction pathway that ________.

At what pH would you expect valine,with a pI of 6.0,to have a 1+ charge?

What is the structural formula of glutamic acid (pI = 3.2)at pH = 1?

Proteins that stimulate immune response are known as ________.

To what main class of enzymes does the enzyme that catalyzes the following reaction belong?

To what main class of enzymes does the enzyme that catalyzes the conversion of lactose to galactose and glucose belong?

The optimum pH for the activity of pepsin is about ________.

A competitive inhibitor is one that ________.

Chemistry in Our Lives

Chemistry and Measurement

Matter and Energy

Atoms and Elements

Nuclear Chemistry

Ionic and Molecular Compounds

Chemical Quantities and Reactions

Gases

Solutions

Acids and Bases and Equilibrium

Introduction to Organic Chemistry: Hydrocarbons

Alcohols, Thiols, Ethers, Aldehydes, and Ketones

Carbohydrates

Carboxylic Acids, Esters, Amines, and Amides

Lipids

Nucleic Acids and Protein Synthesis

Metabolic Pathways and Energy Production

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