Question 1

Zwitterions are

Accepted Answer

A) amino acids. 
B) ionic molecules that are racemic. 
C) ions that bear both negatively and positively charged groups. 
D) side chain carboxylate anions. 
E) delocalized ions. 
A) amino acids. 
B) ionic molecules that are racemic. 
C) ions that bear both negatively and positively charged groups. 
D) side chain carboxylate anions. 
E) delocalized ions.

Question 2

The __________ character of most standard amino acids causes solutions of amino acids to rotate the plane of polarized light.

Accepted Answer

A) chiral 
B) zwitterionic 
C) polar 
D) hydrophobic 
E) none of the above 
A) chiral 
B) zwitterionic 
C) polar 
D) hydrophobic 
E) none of the above

Question 3

The side-chains of amino acids have

Accepted Answer

A) a positive charge in every situation. 
B) pKas that assure the solubility of every protein. 
C) constant pKas no matter what aqueous environment they are found in. 
D) different pKas in peptides as compared to the free amino acids 
E) polar functional groups. 
A) a positive charge in every situation. 
B) pKas that assure the solubility of every protein. 
C) constant pKas no matter what aqueous environment they are found in. 
D) different pKas in peptides as compared to the free amino acids 
E) polar functional groups.

Question 4

The picture below shows the structure of $\gamma$-amino-butyric acid (GABA).   
a.From which amino acid is GABA derived (give the name of the amino acid closest in structure to GABA).
b.What is the structural difference between GABA and this amino acid.
c.What is the function of GABA.

Accepted Answer

a.glutamate
b.GABA is missing

Question 5

While proteins are usually composed of linear chains of amino acids, branched chains of amino acids and internally cross-linked chains can be found in certain proteins.Polypeptide chains are most commonly linked to each other through

Accepted Answer

A) hydrogen bonds. 
B) glycosidic bonds. 
C) peptide bonds. 
D) disulfide bonds. 
E) ester linkages. 
A) hydrogen bonds. 
B) glycosidic bonds. 
C) peptide bonds. 
D) disulfide bonds. 
E) ester linkages.

Question 6

the diagram below  
-What is the three-letter symbol for the amino acid shown above?

Accepted Answer

A) Ala 
B) Asn 
C) Gln 
D) Asp 
E) Glu 
A) Ala 
B) Asn 
C) Gln 
D) Asp 
E) Glu

Question 7

Matching
-GABA is a neurotransmitter derived from ______.

Accepted Answer

A) glutamate 
B) uncharged 
C) deprotonated 
D) three 
E) amino group
F)two
G)C-terminus
H)lysine
I)racemic mixture
J)cysteine
K)zero
L)protonated
M)isoleucine
N)tryptophan
O)phenylalanine
P)N-terminus 
A) glutamate 
B) uncharged 
C) deprotonated 
D) three 
E) amino group
F)two
G)C-terminus
H)lysine
I)racemic mixture
J)cysteine
K)zero
L)protonated
M)isoleucine
N)tryptophan
O)phenylalanine
P)N-terminus

Question 8

the diagram below.  
-What is the three-letter symbol of the N-terminal amino acid in the structure shown above?

Accepted Answer

A) Asp 
B) Asn 
C) Gln 
D) Glu 
E) Lys 
A) Asp 
B) Asn 
C) Gln 
D) Glu 
E) Lys

Zwitterions are

The __________ character of most standard amino acids causes solutions of amino acids to rotate the plane of polarized light.

The side-chains of amino acids have

While proteins are usually composed of linear chains of amino acids, branched chains of amino acids and internally cross-linked chains can be found in certain proteins.Polypeptide chains are most commonly linked to each other through

the diagram below -What is the three-letter symbol for the amino acid shown above?

Matching -GABA is a neurotransmitter derived from ______.

the diagram below. -What is the three-letter symbol of the N-terminal amino acid in the structure shown above?

Introduction to the Chemistry of Life

Water

Nucleotides, Nucleic Acids, and Genetic Information

Proteins: Primary Structure

Proteins: Three-Dimensional Structure

Protein Function Part I: Myoglobin and Hemoglobin

Carbohydrates

Lipids and Biological Membranes

Membrane Transport

Enzyme Catalysis

Enzyme Kinetics, Inhibition and Control

Biochemical Signaling

Introduction to Metabolism

Glycogen Metabolism and Gluconeogenesis

Glucose Catabolism

Citric Acid Cycle

Electron Transport and Oxidative Phosphorylation

Photosynthesis

Lipid Metabolism

Amino Acid Metabolism

Mammalian Fuel Metabolism: Integration and Regulation

Nucleotide Metabolism

Nucleic Acid Structure

Dna Replication, Repair and Recombination

Transcription and Rna Processing

Translation

Regulation of Gene Expression

Filters

Exam 4: Amino Acids

Zwitterions are

The __________ character of most standard amino acids causes solutions of amino acids to rotate the plane of polarized light.

The side-chains of amino acids have

The picture below shows the structure of γ\gammaγ -amino-butyric acid (GABA). a.From which amino acid is GABA derived (give the name of the amino acid closest in structure to GABA). b.What is the structural difference between GABA and this amino acid. c.What is the function of GABA.

While proteins are usually composed of linear chains of amino acids, branched chains of amino acids and internally cross-linked chains can be found in certain proteins.Polypeptide chains are most commonly linked to each other through

the diagram below -What is the three-letter symbol for the amino acid shown above?

Matching -GABA is a neurotransmitter derived from ______.

the diagram below. -What is the three-letter symbol of the N-terminal amino acid in the structure shown above?

Introduction to the Chemistry of Life

Water

Nucleotides, Nucleic Acids, and Genetic Information

Proteins: Primary Structure

Proteins: Three-Dimensional Structure

Protein Function Part I: Myoglobin and Hemoglobin

Carbohydrates

Lipids and Biological Membranes

Membrane Transport

Enzyme Catalysis

Enzyme Kinetics, Inhibition and Control

Biochemical Signaling

Introduction to Metabolism

Glycogen Metabolism and Gluconeogenesis

Glucose Catabolism

Citric Acid Cycle

Electron Transport and Oxidative Phosphorylation

Photosynthesis

Lipid Metabolism

Amino Acid Metabolism

Mammalian Fuel Metabolism: Integration and Regulation

Nucleotide Metabolism

Nucleic Acid Structure

Dna Replication, Repair and Recombination

Transcription and Rna Processing

Translation

Regulation of Gene Expression

Filters