Question 1

Describe what happens during the initiation, elongation, and termination phases of translation.

Accepted Answer

During the initiation phase of translati...

Question 2

In translation, unlike DNA replication, the base-pairing rule is not required.

Accepted Answer

A) True 
 B)False

Question 3

RNA polymerase attaches to regions just outside genes called ____________________.

Accepted Answer

The answer of RNA polymerase attaches to regions just outside...

Question 4

Two tRNA molecules occupy the P and A sites in a ribosome. The amino acids they carry are joined by a peptide bond. What is the very next event that occurs?

Accepted Answer

A)   The tRNA in the P site detaches and leaves the ribosome.
B)   A third tRNA enters the ribosome.
C)   The ribosome moves one codon down the mRNA.
D)   The large subunit leaves the ribosome.
E)   A new amino acid is joined to the tRNA in the P site.F) A) and E)
G) B) and D)

Question 5

Post-translational modification of polypeptides includes

Accepted Answer

A)   attaching lipids to the polypeptides.
B)   attaching sugar to the polypeptides.
C)   chemically changing some amino acids.
D)   removal of some amino acids.
E)   all of these.F) A) and D)
G) D) and E)

Question 6

The antibiotic erythromycin works by inhibiting the movement of ________ along the _________.

Accepted Answer

The answer of The antibiotic erythromycin works by inhibiting the...

Question 7

The secondary level of protein structure involves

Accepted Answer

A)   folding of the primary structure upon itself.
B)   the number of peptide bonds in a polypeptide chain.
C)   substitutions in the amino acid sequence.
D)   interactions with other polypeptide chains.
E)   none of these.F) B) and E)
G) A) and C)

Question 8

Discuss the meaning of the following two statements and determine whether each one is true or false:
(1) One amino acid can be coded for by more than one codon.
(2) One codon can be coded for by more than one amino acid.

Accepted Answer

(1) One amino acid can be coded for by m...

Question 9

Describe the flow of information in the cell.

Accepted Answer

The flow of information in a cell involv...

Question 10

There are three tRNAs with anticodons complementary to stop codons.

Accepted Answer

A) True 
 B)False

Question 11

The genetic code is described as "universal." What does that mean, and why is this very significant to our understanding of life on Earth?

Accepted Answer

The term "universal" in the context of t...

Question 12

Bovine spongiform encephalopathy is caused by a _____________.

Accepted Answer

A)   bacterium
B)   fungus
C)   virus
D)   protein
E)   lipidF) B) and E)
G) A) and B)

Question 13

Tetracyclines interfere with the process of ____________.

Accepted Answer

A)   DNA replication
B)   transcription
C)   translation
D)   protein folding
E)   transformationF) B) and D)
G) A) and B)

Question 14

Outline the role of RNA in the synthesis of polypeptides.

Accepted Answer

RNA, or ribonucleic acid, plays a crucia...

Question 15

Transcription and translation share the three steps of initiation, elongation, and termination.

Accepted Answer

A) True 
 B)False

Question 16

All amino acids are characterized by

Accepted Answer

A)   an amino group and a peptide bond.
B)   a carboxyl group and a peptide bond.
C)   the presence of two R groups.
D)   an amino group and a carboxyl group.
E)   none of these.F) A) and E)
G) D) and E)

Question 17

The shape of a protein is ultimately determined by

Accepted Answer

A)   the interaction of R groups.
B)   interaction with other polypeptide chains.
C)   the amino acid sequence.
D)   bonds formed with other proteins.
E)   none of these.F) None of the above
G) A) and D)

Question 18

Which one of the following is NOT a component of the translation initiation complex?

Accepted Answer

A)   Small ribosome subunit.
B)   Large ribosome subunit.
C)   mRNA.
D)   tRNA.
E)   All of these are components of the initiation complex.F) B) and C)
G) B) and E)

Question 19

How is the order of code words in a DNA molecule related to the order of codons in mRNA and the order of amino acids in a polypeptide chain? Use 5' and 3' designations for the nucleic acids and amino and carboxyl ends to designate the polypeptide chains.

Accepted Answer

The order of code words in a DNA molecul...

Question 20

A string of 30 to 100 adenine nucleotides

Accepted Answer

A)   is found in the promoter region of all genes.
B)   is the sequence of which introns are composed.
C)   is found at the 3'-end of all tRNAs.
D)   is found in the terminator region of all genes.
E)   is added to the 3'-end on mRNA during RNA processing.F) None of the above
G) C) and E)

Exam 9: Gene Expression: From Genes to Proteins

There are three tRNAs with anticodons complementary to stop codons.

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Outline the role of RNA in the synthesis of polypeptides.

Correct AnswerAnswered by ExamLex AIRNA, or ribonucleic acid, plays a crucia...View AnswerShow Answer

Describe what happens during the initiation, elongation, and termination phases of translation.

Correct AnswerAnswered by ExamLex AIDuring the initiation phase of translati...View AnswerShow Answer

The antibiotic erythromycin works by inhibiting the movement of ________ along the _________.

Correct AnswerverifiedShow Answer

The secondary level of protein structure involves

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RNA polymerase attaches to regions just outside genes called ____________________.

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Which one of the following is NOT a component of the translation initiation complex?

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Two tRNA molecules occupy the P and A sites in a ribosome. The amino acids they carry are joined by a peptide bond. What is the very next event that occurs?

Correct AnswerverifiedShow Answer

The shape of a protein is ultimately determined by

Correct AnswerverifiedShow Answer

Discuss the meaning of the following two statements and determine whether each one is true or false: (1) One amino acid can be coded for by more than one codon. (2) One codon can be coded for by more than one amino acid.

Correct AnswerAnswered by ExamLex AI(1) One amino acid can be coded for by m...View AnswerShow Answer

Post-translational modification of polypeptides includes

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A string of 30 to 100 adenine nucleotides

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Tetracyclines interfere with the process of ____________.

Correct AnswerverifiedShow Answer

In translation, unlike DNA replication, the base-pairing rule is not required.

Correct AnswerverifiedShow Answer

Transcription and translation share the three steps of initiation, elongation, and termination.

Correct AnswerverifiedShow Answer

The genetic code is described as "universal." What does that mean, and why is this very significant to our understanding of life on Earth?

Correct AnswerAnswered by ExamLex AIThe term "universal" in the context of t...View AnswerShow Answer

How is the order of code words in a DNA molecule related to the order of codons in mRNA and the order of amino acids in a polypeptide chain? Use 5' and 3' designations for the nucleic acids and amino and carboxyl ends to designate the polypeptide chains.

Correct AnswerAnswered by ExamLex AIThe order of code words in a DNA molecul...View AnswerShow Answer

Bovine spongiform encephalopathy is caused by a _____________.

Correct AnswerverifiedShow Answer

All amino acids are characterized by

Correct AnswerverifiedShow Answer

Describe the flow of information in the cell.

Correct AnswerAnswered by ExamLex AIThe flow of information in a cell involv...View AnswerShow Answer

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RNA, or ribonucleic acid, plays a crucia...
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During the initiation phase of translati...
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The antibiotic erythromycin works by inhibiting the movement of along the _.

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(1) One amino acid can be coded for by m...
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verified

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verified

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Answered by ExamLex AI
The term "universal" in the context of t...
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Answered by ExamLex AI
The order of code words in a DNA molecul...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
Answered by ExamLex AI
The flow of information in a cell involv...
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