Question 1

The protein that transports oxygen in the blood is ________.

Accepted Answer

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

Question 2

The one letter abbreviation for the amino acid tryptophan is ________.

Accepted Answer

A) T 
B) R 
C) Y 
D) W 
E) P 
A) T 
B) R 
C) Y 
D) W 
E) P

Question 3

Immunoglobulin,a protein that stimulates immune responses,would be classified as a ________ protein.

Accepted Answer

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

Question 4

Hydrophobic interactions help to stabilize the ________ structure(s)of a protein.

Accepted Answer

A) primary 
B) secondary 
C) secondary and tertiary 
D) tertiary and quaternary 
E) secondary and quaternary 
A) primary 
B) secondary 
C) secondary and tertiary 
D) tertiary and quaternary 
E) secondary and quaternary

Question 5

Amino acids that are not synthesized in the body and must be obtained from the diet are called ________.

Accepted Answer

A) essential 
B) polar 
C) nonpolar 
D) complete 
E) incomplete 
A) essential 
B) polar 
C) nonpolar 
D) complete 
E) incomplete

Question 6

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

Question 7

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? O     -C-   +   O   2N   +

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 8

The optimum temperature for most biological enzymes is ________.

Accepted Answer

The answer of The optimum temperature for most biological enzymes...

Question 9

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

Accepted Answer

A)    -OH   -   H-COOH 
B)    -OH   -   H-COO- 
C)      H3   -   H-COOH 
D)    -OH H3   -   H-COOH 
E)    -OH H3   -   H-COO- 
A)    -OH   -   H-COOH 
B)    -OH   -   H-COO- 
C)      H3   -   H-COOH 
D)    -OH H3   -   H-COOH 
E)    -OH H3   -   H-COO-

Question 10

Which of the following is not a function of proteins?

Accepted Answer

A) provide structural components 
B) stores the genetic information of a living organism 
C) movement of muscles 
D) catalyze reactions in the cells 
E) transport substances through the bloodstream 
A) provide structural components 
B) stores the genetic information of a living organism 
C) movement of muscles 
D) catalyze reactions in the cells 
E) transport substances through the bloodstream

Question 11

"Physiological conditions" for reactions within the body are approximately ________.

Accepted Answer

A) pH 3.0 and 37 °C 
B) pH 7.4 and 37 °C 
C) pH 7.4 and 37 °F 
D) pH 8.7 and 273 °C 
E) pH 7.4 and 273 K 
A) pH 3.0 and 37 °C 
B) pH 7.4 and 37 °C 
C) pH 7.4 and 37 °F 
D) pH 8.7 and 273 °C 
E) pH 7.4 and 273 K

Question 12

In insulin,two peptide chains are held together in a single unit by ________.

Accepted Answer

A) disulfide bridges 
B) hydrogen bonds 
C) salt bridges 
D) a prosthetic group 
E) a β-pleated sheet 
A) disulfide bridges 
B) hydrogen bonds 
C) salt bridges 
D) a prosthetic group 
E) a β-pleated sheet

Question 13

"Physiological pH," the pH for optimum activity for most enzymes,is a pH equal to about ________.

Accepted Answer

A) 3.0 
B) 5.4 
C) 7.4 
D) 8.6 
E) 9.0 
A) 3.0 
B) 5.4 
C) 7.4 
D) 8.6 
E) 9.0

Question 14

What type of interaction would you expect between the following R groups in the tertiary structure of a protein?

Accepted Answer

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

Question 15

What type of interaction would you expect between the following R groups in the tertiary structure of a protein? O
-       and -         -

Accepted Answer

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

Question 16

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 17

The structural formulas of amino acids are the same except for the ________.

Accepted Answer

A) carboxylate group 
B) alpha carbon 
C) ammonium group 
D) R group 
E) hydrogen bonding 
A) carboxylate group 
B) alpha carbon 
C) ammonium group 
D) R group 
E) hydrogen bonding

Question 18

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 19

An enzyme that removes H atoms to form a double is a (an)________.

Accepted Answer

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

Question 20

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) by hydrogen bonding between different sections of the polypeptide chain 
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) by hydrogen bonding between different sections of the polypeptide chain

The protein that transports oxygen in the blood is ________.

The one letter abbreviation for the amino acid tryptophan is ________.

Immunoglobulin,a protein that stimulates immune responses,would be classified as a ________ protein.

Hydrophobic interactions help to stabilize the ________ structure(s)of a protein.

Amino acids that are not synthesized in the body and must be obtained from the diet are called ________.

A competitive inhibitor is one that ________.

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? O -C- + O 2N +

The optimum temperature for most biological enzymes is ________.

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

Which of the following is not a function of proteins?

"Physiological conditions" for reactions within the body are approximately ________.

In insulin,two peptide chains are held together in a single unit by ________.

"Physiological pH," the pH for optimum activity for most enzymes,is a pH equal to about ________.

What type of interaction would you expect between the following R groups in the tertiary structure of a protein?

What type of interaction would you expect between the following R groups in the tertiary structure of a protein? O - and - -

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

The structural formulas of amino acids are the same except for the ________.

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

An enzyme that removes H atoms to form a double is a (an)________.

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 ________.

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Exam 16: Amino Acids, proteins, and Enzymes

The protein that transports oxygen in the blood is ________.

The one letter abbreviation for the amino acid tryptophan is ________.

Immunoglobulin,a protein that stimulates immune responses,would be classified as a ________ protein.

Hydrophobic interactions help to stabilize the ________ structure(s)of a protein.

Amino acids that are not synthesized in the body and must be obtained from the diet are called ________.

A competitive inhibitor is one that ________.

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? O -C- + O 2N +

The optimum temperature for most biological enzymes is ________.

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

Which of the following is not a function of proteins?

"Physiological conditions" for reactions within the body are approximately ________.

In insulin,two peptide chains are held together in a single unit by ________.

"Physiological pH," the pH for optimum activity for most enzymes,is a pH equal to about ________.

What type of interaction would you expect between the following R groups in the tertiary structure of a protein?

What type of interaction would you expect between the following R groups in the tertiary structure of a protein? O - and - -

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

The structural formulas of amino acids are the same except for the ________.

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

An enzyme that removes H atoms to form a double is a (an)________.

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 ________.

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