Question 1

Ricin is made from castor beans and is a strong toxin which:

Accepted Answer

A)  removes an adenine from 28S rRNA. 
B)  glycosylates tRNA. 
C)  inhibits protein synthesis initiation. 
D)  blocks the A binding site. 
E)  coats the mRNA. 
A)  removes an adenine from 28S rRNA. 
B)  glycosylates tRNA. 
C)  inhibits protein synthesis initiation. 
D)  blocks the A binding site. 
E)  coats the mRNA. A

Question 2

In vanishing white matter disease, nerve cells disappear due to:

Accepted Answer

A)  phagocytosis of living cells. 
B)  an autoimmune result of mutations in mRNA. 
C)  mutation in release factors. 
D)  mutations in initiation factor 2. 
E)  mutations in the tRNA charging mechanism. 
A)  phagocytosis of living cells. 
B)  an autoimmune result of mutations in mRNA. 
C)  mutation in release factors. 
D)  mutations in initiation factor 2. 
E)  mutations in the tRNA charging mechanism. D

Question 3

After the peptide bond forms, the mRNA and tRNA are __________________, or moved, a distance of one codon.

Accepted Answer

translocated

Question 4

GTP binds to the __________________ protein in the translocation mechanism.

Accepted Answer

The answer of GTP binds to the __________________ protein in...

Question 5

What are the names for the tRNA binding sites on the ribosome?

Accepted Answer

They are called the

Question 6

What is the function of RF1?

Accepted Answer

RF1 is a release factor that r

Question 7

What is the direction of translation of mRNA?

Accepted Answer

A)  bidirectional 
B)  5` → 3` 
C)  3` → 5` 
D)  All of the above. 
E)  None of the above. 
A)  bidirectional 
B)  5` → 3` 
C)  3` → 5` 
D)  All of the above. 
E)  None of the above.

Question 8

coli, the signal sequence that properly aligns the initiation codon in the P site is called the __________________ sequence.

Accepted Answer

The answer of coli, the signal sequence that properly aligns...

Question 9

What role does the amino acid itself play in the accurate placement of the charged tRNA at the codon?

Accepted Answer

None. Experiments prove that o

Question 10

What is an iron response element?

Accepted Answer

An IRE is a 5`untranslated ste

Question 11

What is the role of the translocon in protein synthesis?

Accepted Answer

The translocon is a multi-subu

Question 12

Choose the correct answer from the list below. Not all of the answers will be used.

-_______________ include(s) IF1, IF2, and IF3 in prokaryotes.

Accepted Answer

A) initiation factors 
B) ATP 
C) ricin 
D) one 
E) Shine-Dalgarno
F)elongation factor Tu
G)polysome
H)two
I)kanamycin
J)release factor
K)N-formylmethionine
L)signal sequence
M)GTP 
A) initiation factors 
B) ATP 
C) ricin 
D) one 
E) Shine-Dalgarno
F)elongation factor Tu
G)polysome
H)two
I)kanamycin
J)release factor
K)N-formylmethionine
L)signal sequence
M)GTP

Question 13

What factor(s) is (are) necessary for the correct placement of the mRNA and initiating tRNA on the ribosome?

Accepted Answer

A)  IF1 
B)  IF2 
C)  IF3 
D)  A and B 
E)  A, B, and C 
A)  IF1 
B)  IF2 
C)  IF3 
D)  A and B 
E)  A, B, and C

Question 14

Describe the subunits of E. coli ribosomes.

Accepted Answer

E. coli ribosomes contain a large (50S)

Question 15

mRNA that codes for more than one protein is considered __________________.

Accepted Answer

The answer of mRNA that codes for more than one...

Question 16

Choose the correct answer from the list below. Not all of the answers will be used.

-The sequence that interacts with a complementary sequence on the 3` end of the 16S rRNA is _______________.

Accepted Answer

A) initiation factors 
B) ATP 
C) ricin 
D) one 
E) Shine-Dalgarno
F)elongation factor Tu
G)polysome
H)two
I)kanamycin
J)release factor
K)N-formylmethionine
L)signal sequence
M)GTP 
A) initiation factors 
B) ATP 
C) ricin 
D) one 
E) Shine-Dalgarno
F)elongation factor Tu
G)polysome
H)two
I)kanamycin
J)release factor
K)N-formylmethionine
L)signal sequence
M)GTP

Question 17

Choose the correct answer from the list below. Not all of the answers will be used.

-_______________ is the first amino acid in bacteria and typically is chemically modified.

Accepted Answer

A) initiation factors 
B) ATP 
C) ricin 
D) one 
E) Shine-Dalgarno
F)elongation factor Tu
G)polysome
H)two
I)kanamycin
J)release factor
K)N-formylmethionine
L)signal sequence
M)GTP 
A) initiation factors 
B) ATP 
C) ricin 
D) one 
E) Shine-Dalgarno
F)elongation factor Tu
G)polysome
H)two
I)kanamycin
J)release factor
K)N-formylmethionine
L)signal sequence
M)GTP

Question 18

The signal sequence that marks a protein for translocation across the endoplasmic reticulum membrane is located near the __________________ end of the protein.

Accepted Answer

N-terminal

Question 19

Initiation, elongation, and termination all require factors that are members of the __________________ family.

Accepted Answer

The answer of Initiation, elongation, and termination all require factors...

Question 20

Can a protein fully translated and released from a ribosome enter the mitochondria or ER lumen?

Accepted Answer

No, entry into the mitochondri

Exam 40: The Mechanism of Protein Synthesis

Ricin is made from castor beans and is a strong toxin which:

In vanishing white matter disease, nerve cells disappear due to:

After the peptide bond forms, the mRNA and tRNA are __________________, or moved, a distance of one codon.

GTP binds to the __________________ protein in the translocation mechanism.

What are the names for the tRNA binding sites on the ribosome?

What is the function of RF1?

What is the direction of translation of mRNA?

coli, the signal sequence that properly aligns the initiation codon in the P site is called the __________________ sequence.

What role does the amino acid itself play in the accurate placement of the charged tRNA at the codon?

What is an iron response element?

What is the role of the translocon in protein synthesis?

Choose the correct answer from the list below. Not all of the answers will be used. -_______________ include(s) IF1, IF2, and IF3 in prokaryotes.

What factor(s) is (are) necessary for the correct placement of the mRNA and initiating tRNA on the ribosome?

Describe the subunits of E. coli ribosomes.

mRNA that codes for more than one protein is considered __________________.

Choose the correct answer from the list below. Not all of the answers will be used. -The sequence that interacts with a complementary sequence on the 3` end of the 16S rRNA is _______________.

Choose the correct answer from the list below. Not all of the answers will be used. -_______________ is the first amino acid in bacteria and typically is chemically modified.

The signal sequence that marks a protein for translocation across the endoplasmic reticulum membrane is located near the __________________ end of the protein.

Initiation, elongation, and termination all require factors that are members of the __________________ family.

Can a protein fully translated and released from a ribosome enter the mitochondria or ER lumen?

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 Genetic Code

Recombinant DNA Techniques

Filters