Question 1

A noncompetitive inhibitor ________.

Accepted Answer

A) binds at the active site of the enzyme 
B) alters the three-dimensional structure of the enzyme 
C) increases the rate of the enzyme-catalyzed reaction 
D) has a structure similar to the substrate 
E) has its effect reversed by adding more substrate 
A) binds at the active site of the enzyme 
B) alters the three-dimensional structure of the enzyme 
C) increases the rate of the enzyme-catalyzed reaction 
D) has a structure similar to the substrate 
E) has its effect reversed by adding more substrate

Question 2

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

Question 3

The protein that transports oxygen in the blood is ________.

Accepted Answer

The answer of The protein that transports oxygen in the...

Question 4

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 5

The active site of an enzyme ________.

Accepted Answer

A) is remote from the site of substrate attachment 
B) is converted to a product 
C) is the region where the reaction takes place 
D) increases the energy of reaction 
E) includes the entire enzyme 
A) is remote from the site of substrate attachment 
B) is converted to a product 
C) is the region where the reaction takes place 
D) increases the energy of reaction 
E) includes the entire enzyme

Question 6

Consider the R groups of the following amino acids: cysteine: -CH2SH alanine: -CH3 ; serine: - CH2OH
The name for the dipeptide shown below is ________.

Accepted Answer

A) alanylcysteine 
B) alanylserine 
C) serylalanine 
D) serylcysteine 
E) serinealanine 
A) alanylcysteine 
B) alanylserine 
C) serylalanine 
D) serylcysteine 
E) serinealanine

Question 7

A chain made of more than 50 amino acids that has biological activity is referred to as a(n)________.

Accepted Answer

A) peptide 
B) protein 
C) enzyme 
D) globulin 
E) hormone 
A) peptide 
B) protein 
C) enzyme 
D) globulin 
E) hormone

Question 8

What type of amino acids has polar side chains that are attracted to water?

Accepted Answer

A) hydrophilic 
B) hydrophobic 
C) nonpolar 
D) aromatic 
E) hydrocarbon 
A) hydrophilic 
B) hydrophobic 
C) nonpolar 
D) aromatic 
E) hydrocarbon

Question 9

Sucrase,the protein that facilitates the hydrolysis of sucrose,would be classified as a ________ protein.

Accepted Answer

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

Question 10

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 11

Wool is primarily made up of ________.

Accepted Answer

A) protein 
B) carbohydrate 
C) globin 
D) triacylglycerols 
E) enkephalin 
A) protein 
B) carbohydrate 
C) globin 
D) triacylglycerols 
E) enkephalin

Question 12

Urea is converted to ammonia and carbon dioxide by the action of urease.What will be the effect on the rate if the temperature of the reaction is lowered from 37 °C (the optimum temperature)to 27 °C?

Accepted Answer

A) There will be no effect. 
B) The rate will slow down. 
C) The rate will double. 
D) The rate will triple. 
E) The rate will slow down,then speed up again. 
A) There will be no effect. 
B) The rate will slow down. 
C) The rate will double. 
D) The rate will triple. 
E) The rate will slow down,then speed up again.

Question 13

Within hemoglobin,the heme functions as ________.

Accepted Answer

A) a disulfide bridge 
B) an oxygen carrier 
C) a reducing agent 
D) an α subunit 
E) one of the four protein subunits 
A) a disulfide bridge 
B) an oxygen carrier 
C) a reducing agent 
D) an α subunit 
E) one of the four protein subunits

Question 14

The R group for serine is -CH2-OH. In the ionized form,serine has the structural formula ________.

Accepted Answer

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

Question 15

At a pH > 9,the ionized form of glycine 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 nitrogen 
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 nitrogen

Question 16

The following amino acid side chain is ________.

Accepted Answer

A) polar 
B) hydrophobic 
C) hydrophilic 
D) acidic 
E) basic 
A) polar 
B) hydrophobic 
C) hydrophilic 
D) acidic 
E) basic

Question 17

An acid can denature a protein by ________.

Accepted Answer

A) agitating the protein chains 
B) disrupting hydrogen bonds between side chains 
C) disrupting hydrophobic interactions within a protein chain 
D) removing helping molecules such as heme 
E) breaking disulfide bridges 
A) agitating the protein chains 
B) disrupting hydrogen bonds between side chains 
C) disrupting hydrophobic interactions within a protein chain 
D) removing helping molecules such as heme 
E) breaking disulfide bridges

Question 18

Which of the following is not true for a competitive inhibitor?

Accepted Answer

A) It occupies the active site 
B) It cannot be converted to products 
C) It has a structure similar to the substrate 
D) Increasing the substrate concentration can reverse competitive inhibition 
E) It binds to the enzyme at a site remote from the active site 
A) It occupies the active site 
B) It cannot be converted to products 
C) It has a structure similar to the substrate 
D) Increasing the substrate concentration can reverse competitive inhibition 
E) It binds to the enzyme at a site remote from the active site

Question 19

Circle the peptide bond in this structure.

Accepted Answer

The answer of Circle the peptide bond in this structure....

Question 20

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

A noncompetitive inhibitor ________.

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

The protein that transports oxygen in the blood is ________.

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

The active site of an enzyme ________.

Consider the R groups of the following amino acids: cysteine: -CH₂SH alanine: -CH₃ ; serine: - CH₂OH The name for the dipeptide shown below is ________.

A chain made of more than 50 amino acids that has biological activity is referred to as a(n)________.

What type of amino acids has polar side chains that are attracted to water?

Sucrase,the protein that facilitates the hydrolysis of sucrose,would be classified as a ________ protein.

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

Wool is primarily made up of ________.

Urea is converted to ammonia and carbon dioxide by the action of urease.What will be the effect on the rate if the temperature of the reaction is lowered from 37 °C (the optimum temperature)to 27 °C?

Within hemoglobin,the heme functions as ________.

The R group for serine is -CH₂-OH. In the ionized form,serine has the structural formula ________.

At a pH > 9,the ionized form of glycine will have ________.

The following amino acid side chain is ________.

An acid can denature a protein by ________.

Which of the following is not true for a competitive inhibitor?

Circle the peptide bond in this structure.

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

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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

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Exam 16: Amino Acids, Proteins, and Enzymes

A noncompetitive inhibitor ________.

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

The protein that transports oxygen in the blood is ________.

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

The active site of an enzyme ________.

Consider the R groups of the following amino acids: cysteine: -CH2SH alanine: -CH3 ; serine: - CH2OH The name for the dipeptide shown below is ________.

A chain made of more than 50 amino acids that has biological activity is referred to as a(n)________.

What type of amino acids has polar side chains that are attracted to water?

Sucrase,the protein that facilitates the hydrolysis of sucrose,would be classified as a ________ protein.

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

Wool is primarily made up of ________.

Urea is converted to ammonia and carbon dioxide by the action of urease.What will be the effect on the rate if the temperature of the reaction is lowered from 37 °C (the optimum temperature)to 27 °C?

Within hemoglobin,the heme functions as ________.

The R group for serine is -CH2-OH. In the ionized form,serine has the structural formula ________.

At a pH > 9,the ionized form of glycine will have ________.

The following amino acid side chain is ________.

An acid can denature a protein by ________.

Which of the following is not true for a competitive inhibitor?

Circle the peptide bond in this structure.

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

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

Filters

Consider the R groups of the following amino acids: cysteine: -CH₂SH alanine: -CH₃ ; serine: - CH₂OH The name for the dipeptide shown below is ________.

The R group for serine is -CH₂-OH. In the ionized form,serine has the structural formula ________.