Question 1

At a pH of 12, what charged group(s) is/are present in glycine?

Accepted Answer

A)  -NH3+ 
B)  -COO- 
C)  -NH2+ 
D)  A and B 
E)  A, B, and C 
A)  -NH3+ 
B)  -COO- 
C)  -NH2+ 
D)  A and B 
E)  A, B, and C

Question 2

List the essential amino acids.

Accepted Answer

Histadine, isoleucine, leucine

Question 3

Use the following to answer questions
Choose the correct answer from the list below. Not all of the answers will be used.
-____________: Disulfide bonds are formed by pairs of this amino acid.

Accepted Answer

A) L amino acids 
B) water 
C) protons 
D) zwitterions 
E) leucine
F)serine
G)tyrosine
H)cysteine
I)glutamate
J)histidine
K)proline
L)asparagine
M)D amino acids 
A) L amino acids 
B) water 
C) protons 
D) zwitterions 
E) leucine
F)serine
G)tyrosine
H)cysteine
I)glutamate
J)histidine
K)proline
L)asparagine
M)D amino acids

Question 4

Which amino acids have a side chain that includes a modified carboxyl group, carboxaminde?

Accepted Answer

Asparagine

Question 5

Interactions between side chains of and Aspartate and Arginine at neutral pH would be?

Accepted Answer

A)  hydrophobic 
B)  ionic 
C)  hydrogen bonding 
D)  steric 
E)  covalent 
A)  hydrophobic 
B)  ionic 
C)  hydrogen bonding 
D)  steric 
E)  covalent

Question 6

Which are the branched amino acids and what impact do they have on protein shape?

Accepted Answer

These are the aliphatic, hydrophobic ami

Question 7

Use the following to answer questions
Choose the correct answer from the list below. Not all of the answers will be used.
-____________: The amino acid with the abbreviation Ser.

Accepted Answer

A) L amino acids 
B) water 
C) protons 
D) zwitterions 
E) leucine
F)serine
G)tyrosine
H)cysteine
I)glutamate
J)histidine
K)proline
L)asparagine
M)D amino acids 
A) L amino acids 
B) water 
C) protons 
D) zwitterions 
E) leucine
F)serine
G)tyrosine
H)cysteine
I)glutamate
J)histidine
K)proline
L)asparagine
M)D amino acids

Question 8

What is the difference between nonessential and essential amino acids?

Accepted Answer

The former are amino acids tha

Question 9

Which ionizable group has the lowest affinity for protons: the terminal ɑ-carboxyl group, the aspartic acid side group, or the terminal ɑ-amino group?

Accepted Answer

The termin

Question 10

What is the advantage of having multiple functional groups in proteins?

Accepted Answer

The rich diversity of function

Question 11

Which amino acids contain reactive aliphatic hydroxyl groups?

Accepted Answer

A)  serine and methionine 
B)  serine and threonine 
C)  methionine and threonine 
D)  cysteine and methionine 
E)  cysteine and threonine 
A)  serine and methionine 
B)  serine and threonine 
C)  methionine and threonine 
D)  cysteine and methionine 
E)  cysteine and threonine

Question 12

What is the net charge of each amino acid for each of the cases in the question above?

Accepted Answer

For glycine, the charges are:

Question 13

In what pH range is zwitterionic alanine the predominate structure?

Accepted Answer

A)  0-2 
B)  9-14 
C)  8-10 
D)  2-4 
E)  2-9 
A)  0-2 
B)  9-14 
C)  8-10 
D)  2-4 
E)  2-9

Question 14

The ____________ group is the functional group that makes an amino acid more reactive than nonpolar amino acids such as valine, alanine, and phenylalanine.

Accepted Answer

The answer of The ____________ group is the functional group...

Question 15

Which amino acid side chains are capable of ionization?

Accepted Answer

The amino acids are

Question 16

Use the following to answer questions
Choose the correct answer from the list below. Not all of the answers will be used.
-____________: The amino acid with a pKa near neutral pH.

Accepted Answer

A) L amino acids 
B) water 
C) protons 
D) zwitterions 
E) leucine
F)serine
G)tyrosine
H)cysteine
I)glutamate
J)histidine
K)proline
L)asparagine
M)D amino acids 
A) L amino acids 
B) water 
C) protons 
D) zwitterions 
E) leucine
F)serine
G)tyrosine
H)cysteine
I)glutamate
J)histidine
K)proline
L)asparagine
M)D amino acids

Question 17

The overall charge of a peptide of the following peptide sequence at pH 1 would be (Asp-Gly-Arg-His):

Accepted Answer

A)  −1 
B)  0 
C)  1 
D)  2 
E)  3 
A)  −1 
B)  0 
C)  1 
D)  2 
E)  3

Question 18

The amino acid that contains a weakly acidic "phenolic" group is __________.

Accepted Answer

The answer of The amino acid that contains a weakly...

Question 19

The group of amino acids that can be supplied by an organism under a defined condition are the ______ amino acids.

Accepted Answer

The answer of The group of amino acids that can...

Question 20

Use the following to answer questions
Choose the correct answer from the list below. Not all of the answers will be used.
-____________: An amino acid that must be supplied by the diet.

Accepted Answer

A) L amino acids 
B) water 
C) protons 
D) zwitterions 
E) leucine
F)serine
G)tyrosine
H)cysteine
I)glutamate
J)histidine
K)proline
L)asparagine
M)D amino acids 
A) L amino acids 
B) water 
C) protons 
D) zwitterions 
E) leucine
F)serine
G)tyrosine
H)cysteine
I)glutamate
J)histidine
K)proline
L)asparagine
M)D amino acids

Exam 3: Amino Acids

At a pH of 12, what charged group(s) is/are present in glycine?

List the essential amino acids.

Use the following to answer questions Choose the correct answer from the list below. Not all of the answers will be used. -____________: Disulfide bonds are formed by pairs of this amino acid.

Which amino acids have a side chain that includes a modified carboxyl group, carboxaminde?

Interactions between side chains of and Aspartate and Arginine at neutral pH would be?

Which are the branched amino acids and what impact do they have on protein shape?

Use the following to answer questions Choose the correct answer from the list below. Not all of the answers will be used. -____________: The amino acid with the abbreviation Ser.

What is the difference between nonessential and essential amino acids?

Which ionizable group has the lowest affinity for protons: the terminal ɑ-carboxyl group, the aspartic acid side group, or the terminal ɑ-amino group?

What is the advantage of having multiple functional groups in proteins?

Which amino acids contain reactive aliphatic hydroxyl groups?

What is the net charge of each amino acid for each of the cases in the question above?

In what pH range is zwitterionic alanine the predominate structure?

The ____________ group is the functional group that makes an amino acid more reactive than nonpolar amino acids such as valine, alanine, and phenylalanine.

Which amino acid side chains are capable of ionization?

Use the following to answer questions Choose the correct answer from the list below. Not all of the answers will be used. -____________: The amino acid with a pKa near neutral pH.

The overall charge of a peptide of the following peptide sequence at pH 1 would be (Asp-Gly-Arg-His):

The amino acid that contains a weakly acidic "phenolic" group is __________.

The group of amino acids that can be supplied by an organism under a defined condition are the ______ amino acids.

Use the following to answer questions Choose the correct answer from the list below. Not all of the answers will be used. -____________: An amino acid that must be supplied by the diet.

Biochemistry and the Unity of Life

Water, Weak Bonds, and the Generation of Order Out of Chaos

Protein Three-Dimensional Structure

Techniques in Protein Biochemistry

Basic Concepts of Enzyme Action

Kinetics and Regulation

Mechanisms and Inhibitors

Hemoglobin: an Allosteric Protein

Carbohydrates

Lipids

Membrane Structure and Function

Signal Transduction Pathways

Digestion: Turning a Meal Into Cellular Biochemicals

Metabolism: Basic Concepts and Design

Glycolysis

Gluconeogenesis

Preparation for the Cycle

Harvesting Electrons From the Cycle

The Electron Transport Chain

The Proton-Motive Force

The Light Reactions

The Calvin Cycle

Glycogen Degradation

Glycogen Synthesis

The Pentose Phosphate Pathway

Fatty Acid Degredation

Fatty Acid Synthesis

Lipid Synthesis

Amino Acid Degradation and the Urea Cycle

Amino Acids Synthesis

Nucleotide Metabolism

The Structure of Informational Macromolecules: Dna and Rna

DNA Replication

DNA Repair and Recombination

RNA Synthesis and Regulation in Prokaryotes

Gene Expression in Eukaryotes

RNA Processing in Eukaryotes

The Genetic Code

The Mechanism of Protein Synthesis

Recombinant Dna Techniques

Filters