Question 1

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 2

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 3

Enkephalins are polypeptides that have ________.

Accepted Answer

A) a sweet taste 
B) a bitter taste 
C) extra caloric value 
D) pain-killing properties 
E) hormone activity 
A) a sweet taste 
B) a bitter taste 
C) extra caloric value 
D) pain-killing properties 
E) hormone activity

Question 4

In the ionized form of an amino acid,the carboxylic acid end is ________.

Accepted Answer

A) positively charged 
B) negatively charged 
C) neutral 
D) soluble in a nonpolar solvent 
E) attached to an amine 
A) positively charged 
B) negatively charged 
C) neutral 
D) soluble in a nonpolar solvent 
E) attached to an amine

Question 5

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 6

Acids and bases denature a protein by disrupting ________.

Accepted Answer

A) peptide bonds and salt bridges 
B) amide bonds and alkene bonds 
C) hydrophobic interactions and peptide bonds 
D) salt bridges and hydrophobic interactions 
E) salt bridges and hydrogen bonds 
A) peptide bonds and salt bridges 
B) amide bonds and alkene bonds 
C) hydrophobic interactions and peptide bonds 
D) salt bridges and hydrophobic interactions 
E) salt bridges and hydrogen bonds

Question 7

In sickle-cell anemia,the hemoglobin molecules ________.

Accepted Answer

A) come apart into separate chains 
B) enlarge to twice normal size 
C) clump together into insoluble fibers 
D) dissolve in the plasma 
E) undergo crenation 
A) come apart into separate chains 
B) enlarge to twice normal size 
C) clump together into insoluble fibers 
D) dissolve in the plasma 
E) undergo crenation

Question 8

The attractive forces that are important in the secondary structure of a protein are ________.

Accepted Answer

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

Question 9

A completely vegetarian diet will contain all the essential amino acids if it includes ________.

Accepted Answer

A) wheat and rice 
B) rice and beans 
C) almonds and walnuts 
D) corn and beans 
E) wheat and corn 
A) wheat and rice 
B) rice and beans 
C) almonds and walnuts 
D) corn and beans 
E) wheat and corn

Question 10

In the induced-fit model of enzyme action,the enzyme active site ________.

Accepted Answer

A) stays the same shape during substrate binding 
B) adjusts shape to adapt to the shape of the substrate 
C) stays the same shape while causing a change in the shape of the substrate 
D) uses an inhibitor to adjust its shape for the substrate 
E) uses a cofactor to change the shape of a substrate 
A) stays the same shape during substrate binding 
B) adjusts shape to adapt to the shape of the substrate 
C) stays the same shape while causing a change in the shape of the substrate 
D) uses an inhibitor to adjust its shape for the substrate 
E) uses a cofactor to change the shape of a substrate

Question 11

A basic amino acid has a side chain that contains ________.

Accepted Answer

A) an ammonium group 
B) a carboxyl ate group 
C) a methyl group 
D) an alcohol group 
E) a thiol group 
A) an ammonium group 
B) a carboxyl ate group 
C) a methyl group 
D) an alcohol group 
E) a thiol group

Question 12

Compared to an uncatalyzed reaction,an enzyme-catalyzed reaction ________.

Accepted Answer

A) uses less substrate 
B) produces different products 
C) occurs at a faster rate 
D) requires more energy 
E) requires a higher temperature 
A) uses less substrate 
B) produces different products 
C) occurs at a faster rate 
D) requires more energy 
E) requires a higher temperature

Question 13

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 14

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 15

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 16

Heavy metals denature proteins by ________.

Accepted Answer

A) releasing amino acids 
B) disrupting hydrophobic interactions 
C) changing the pH of the protein solution 
D) changing the temperature of the protein solution 
E) disrupting disulfide bonds 
A) releasing amino acids 
B) disrupting hydrophobic interactions 
C) changing the pH of the protein solution 
D) changing the temperature of the protein solution 
E) disrupting disulfide bonds

Question 17

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

Accepted Answer

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

Question 18

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 19

The formation of an enzyme-substrate complex is the ________ step in enzyme action.

Accepted Answer

A) first 
B) second 
C) third 
D) fourth 
E) last 
A) first 
B) second 
C) third 
D) fourth 
E) last

Question 20

The full name of the enzyme LDH is ________.

Accepted Answer

A) lactate dehydrogenase 
B) liver decompensation hexase 
C) lactate dehydrase 
D) liver dihydrogen kinase 
E) lipase dehydrogenase 
A) lactate dehydrogenase 
B) liver decompensation hexase 
C) lactate dehydrase 
D) liver dihydrogen kinase 
E) lipase dehydrogenase

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

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

Enkephalins are polypeptides that have ________.

In the ionized form of an amino acid,the carboxylic acid end is ________.

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

Acids and bases denature a protein by disrupting ________.

In sickle-cell anemia,the hemoglobin molecules ________.

The attractive forces that are important in the secondary structure of a protein are ________.

A completely vegetarian diet will contain all the essential amino acids if it includes ________.

In the induced-fit model of enzyme action,the enzyme active site ________.

A basic amino acid has a side chain that contains ________.

Compared to an uncatalyzed reaction,an enzyme-catalyzed reaction ________.

Which of the following is a secondary protein structure?

A noncompetitive inhibitor has a structure that ________.

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

Heavy metals denature proteins by ________.

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

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

The formation of an enzyme-substrate complex is the ________ step in enzyme action.

The full name of the enzyme LDH is ________.

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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Exam 16: Amino Acids, proteins, and Enzymes

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

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

Enkephalins are polypeptides that have ________.

In the ionized form of an amino acid,the carboxylic acid end is ________.

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

Acids and bases denature a protein by disrupting ________.

In sickle-cell anemia,the hemoglobin molecules ________.

The attractive forces that are important in the secondary structure of a protein are ________.

A completely vegetarian diet will contain all the essential amino acids if it includes ________.

In the induced-fit model of enzyme action,the enzyme active site ________.

A basic amino acid has a side chain that contains ________.

Compared to an uncatalyzed reaction,an enzyme-catalyzed reaction ________.

Which of the following is a secondary protein structure?

A noncompetitive inhibitor has a structure that ________.

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

Heavy metals denature proteins by ________.

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

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

The formation of an enzyme-substrate complex is the ________ step in enzyme action.

The full name of the enzyme LDH is ________.

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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