Question 1

Use the following to answer questions 
Choose the correct answer from the list below. Not all of the answers will be used.
-The 5` end 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 F

Question 2

Use the following to answer questions 
Choose the correct answer from the list below. Not all of the answers will be used.
-Hydrolysis of _______________ drives the charging of tRNA with amino acids.

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 C

Question 3

How much energy is used to attach the amino acid to the tRNA?

Accepted Answer

The equivalents of two ATPs are necessary because acylation is driven by the hydrolysis of the pyrophosphate bond.

Question 4

Explain why some bases in RNA cannot be involved in base pairs.

Accepted Answer

RNA contains some unusual base

Question 5

Precision of tRNA-mRNA recognition takes place at the first __________________ base pairs of the codon.

Accepted Answer

The answer of Precision of tRNA-mRNA recognition takes place at...

Question 6

Describe the subunits of E. coli ribosomes.

Accepted Answer

E. coli ribosomes contain a large (50S)

Question 7

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 8

Why is it important that transcription and translation are tightly coupled?

Accepted Answer

This increases the efficiency

Question 9

What is the amino acid error rate in protein synthesis? Is this rate logical in evolutionary terms of function?

Accepted Answer

The error rate is approximatel

Question 10

Use the following to answer questions 
Choose the correct answer from the list below. Not all of the answers will be used.
-In prokaryotic gene expression, _______________ and translation are closely coupled in time and space.

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 11

Protein synthesis takes place on:

Accepted Answer

A)  lysozomes. 
B)  nuclear pores. 
C)  vacuoles. 
D)  ribosomes 
E)  None of the above. 
A)  lysozomes. 
B)  nuclear pores. 
C)  vacuoles. 
D)  ribosomes 
E)  None of the above.

Question 12

Use the following to answer questions 
Choose the correct answer from the list below. Not all of the answers will be used.
-The small subunit of the ribosome 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 13

Use the following to answer questions 
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 14

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

Accepted Answer

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

Question 15

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 16

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

Accepted Answer

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

Question 17

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 18

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 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 19

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 20

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.

Exam 39: The Genetic Code

Use the following to answer questions Choose the correct answer from the list below. Not all of the answers will be used. -The 5` end of tRNA is _______________.

Use the following to answer questions Choose the correct answer from the list below. Not all of the answers will be used. -Hydrolysis of _______________ drives the charging of tRNA with amino acids.

How much energy is used to attach the amino acid to the tRNA?

Explain why some bases in RNA cannot be involved in base pairs.

Precision of tRNA-mRNA recognition takes place at the first __________________ base pairs of the codon.

Describe the subunits of E. coli ribosomes.

Which amino acid has only one codon triplet?

Why is it important that transcription and translation are tightly coupled?

What is the amino acid error rate in protein synthesis? Is this rate logical in evolutionary terms of function?

Use the following to answer questions Choose the correct answer from the list below. Not all of the answers will be used. -In prokaryotic gene expression, _______________ and translation are closely coupled in time and space.

Protein synthesis takes place on:

Use the following to answer questions Choose the correct answer from the list below. Not all of the answers will be used. -The small subunit of the ribosome is _______________.

Use the following to answer questions 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.

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

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

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

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?

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 is attached to the tRNA molecule at _______________.

The ribosome is thought to be:

What are some of the features common to tRNA molecules?

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