Question 1

Choose the correct answer from the list below. Not all of the answers will be used.
-The amino acid is attached to the tRNA molecule at _______________.

Accepted Answer

A) CCA 3` 
B) polysome 
C) PPi hydrolysis 
D) transcription 
E) translation
F)phosphorylated
G)pG
H)two
I)wobble
J)three
K)charged tRNA
L)30S
M)20S 
A) CCA 3` 
B) polysome 
C) PPi hydrolysis 
D) transcription 
E) translation
F)phosphorylated
G)pG
H)two
I)wobble
J)three
K)charged tRNA
L)30S
M)20S

Question 2

The 3` CCA terminal region of tRNA contains the __________________.

Accepted Answer

The answer of The 3` CCA terminal region of tRNA...

Question 3

The start signal for most organisms is:

Accepted Answer

A)  ATG. 
B)  AUG. 
C)  AAA. 
D)  UAA. 
E)  AGG. 
A)  ATG. 
B)  AUG. 
C)  AAA. 
D)  UAA. 
E)  AGG.

Question 4

What is significant about the direction of transcription and translation?

Accepted Answer

Transcription and translation are both c

Question 5

The activation of a tRNA involves the formation of an __________________ intermediate.

Accepted Answer

The answer of The activation of a tRNA involves the...

Question 6

What are some of the features common to tRNA molecules?

Accepted Answer

A)  Each is a single chain with between 73 and 93 ribonucleotides. 
B)  They contain many unusual bases. 
C)  About half the nucleotides in tRNA are base-paired. 
D)  They usually have a pG at the 5′ terminal. 
E)  All of the above. 
A)  Each is a single chain with between 73 and 93 ribonucleotides. 
B)  They contain many unusual bases. 
C)  About half the nucleotides in tRNA are base-paired. 
D)  They usually have a pG at the 5′ terminal. 
E)  All of the above.

Question 7

Choose the correct answer from the list below. Not all of the answers will be used.
-An I in the first position of the anticodon indicates that _______________ codons can be read by that tRNA.

Accepted Answer

A) CCA 3` 
B) polysome 
C) PPi hydrolysis 
D) transcription 
E) translation
F)phosphorylated
G)pG
H)two
I)wobble
J)three
K)charged tRNA
L)30S
M)20S 
A) CCA 3` 
B) polysome 
C) PPi hydrolysis 
D) transcription 
E) translation
F)phosphorylated
G)pG
H)two
I)wobble
J)three
K)charged tRNA
L)30S
M)20S

Question 8

In preparation for attachment to the tRNA, amino acids are activated by:

Accepted Answer

A)  methylation. 
B)  adenylation. 
C)  dimethylation. 
D)  All of the above. 
E)  None of the above. 
A)  methylation. 
B)  adenylation. 
C)  dimethylation. 
D)  All of the above. 
E)  None of the above.

Question 9

Accuracy during translation occurs because of:

Accepted Answer

A)  codon degeneracy. 
B)  wobble at the third site. 
C)  tRNA specificity in binding the mRNA. 
D)  aminoacyl tRNA charging. 
E)  the structure of mRNA and the stability of that molecule. 
A)  codon degeneracy. 
B)  wobble at the third site. 
C)  tRNA specificity in binding the mRNA. 
D)  aminoacyl tRNA charging. 
E)  the structure of mRNA and the stability of that molecule.

Question 10

What is meant by the statement "Degeneracy minimizes the deleterious effects of mutation"?

Accepted Answer

For many amino acids, a mutation, such a

Question 11

What is significant about yeast alanyl-tRNA?

Accepted Answer

Alanyl-tRNA from yeast has the

Question 12

The error frequency of protein synthesis is approximately __________________.

Accepted Answer

The answer of The error frequency of protein synthesis is...

Question 13

Choose the correct answer from the list below. Not all of the answers will be used.
-The term applied to the process of protein synthesis is _______________.

Accepted Answer

A) CCA 3` 
B) polysome 
C) PPi hydrolysis 
D) transcription 
E) translation
F)phosphorylated
G)pG
H)two
I)wobble
J)three
K)charged tRNA
L)30S
M)20S 
A) CCA 3` 
B) polysome 
C) PPi hydrolysis 
D) transcription 
E) translation
F)phosphorylated
G)pG
H)two
I)wobble
J)three
K)charged tRNA
L)30S
M)20S

Question 14

Where is the attachment site and where is the anticodon loop with respect to the nucleotide sequence and with respect to the L-shaped structure of tRNA?

Accepted Answer

The amino acid is attached to the CCA se

Question 15

The synthesis of __________________ is the crucial step in protein synthesis.

Accepted Answer

The answer of The synthesis of __________________ is the crucial...

Question 16

Class I aminoacyl-tRNA synthetases acylate the __________________ or 3` hydroxyl group of the terminal adenosine of tRNA.

Accepted Answer

The answer of Class I aminoacyl-tRNA synthetases acylate the __________________...

Question 17

The ribosome is thought to be:

Accepted Answer

A)  an example of a catalyst that has survived from the RNA world. 
B)  unique to eukaryotes. 
C)  a ribozyme. 
D)  A and C. 
E)  A, B, and C. 
A)  an example of a catalyst that has survived from the RNA world. 
B)  unique to eukaryotes. 
C)  a ribozyme. 
D)  A and C. 
E)  A, B, and C.

Question 18

Which amino acid has only one codon triplet?

Accepted Answer

A)  phenylalanine 
B)  alanine 
C)  methionine 
D)  aspartate 
E)  None of the above. 
A)  phenylalanine 
B)  alanine 
C)  methionine 
D)  aspartate 
E)  None of the above.

Question 19

How is a high level of fidelity maintained in attaching the amino acids to the tRNA structure?

Accepted Answer

The reaction has very high fidelity in r

Question 20

Choose the correct answer from the list below. Not all of the answers will be used.
-Another name for an amino acid ester of tRNA is _______________.

Accepted Answer

A) CCA 3` 
B) polysome 
C) PPi hydrolysis 
D) transcription 
E) translation
F)phosphorylated
G)pG
H)two
I)wobble
J)three
K)charged tRNA
L)30S
M)20S 
A) CCA 3` 
B) polysome 
C) PPi hydrolysis 
D) transcription 
E) translation
F)phosphorylated
G)pG
H)two
I)wobble
J)three
K)charged tRNA
L)30S
M)20S

Exam 39: The Genetic Code

Choose the correct answer from the list below. Not all of the answers will be used. -The amino acid is attached to the tRNA molecule at _______________.

The 3` CCA terminal region of tRNA contains the __________________.

The start signal for most organisms is:

What is significant about the direction of transcription and translation?

The activation of a tRNA involves the formation of an __________________ intermediate.

What are some of the features common to tRNA molecules?

Choose the correct answer from the list below. Not all of the answers will be used. -An I in the first position of the anticodon indicates that _______________ codons can be read by that tRNA.

In preparation for attachment to the tRNA, amino acids are activated by:

Accuracy during translation occurs because of:

What is meant by the statement "Degeneracy minimizes the deleterious effects of mutation"?

What is significant about yeast alanyl-tRNA?

The error frequency of protein synthesis is approximately __________________.

Choose the correct answer from the list below. Not all of the answers will be used. -The term applied to the process of protein synthesis is _______________.

Where is the attachment site and where is the anticodon loop with respect to the nucleotide sequence and with respect to the L-shaped structure of tRNA?

The synthesis of __________________ is the crucial step in protein synthesis.

Class I aminoacyl-tRNA synthetases acylate the __________________ or 3` hydroxyl group of the terminal adenosine of tRNA.

The ribosome is thought to be:

Which amino acid has only one codon triplet?

How is a high level of fidelity maintained in attaching the amino acids to the tRNA structure?

Choose the correct answer from the list below. Not all of the answers will be used. -Another name for an amino acid ester of tRNA is _______________.

Biochemistry and the Unity of Life

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

Amino Acids

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 Mechanism of Protein Synthesis

Recombinant DNA Techniques

Filters