Question 1

Which amino acid other than methionine is coded for by only a single codon?

Accepted Answer

A)  glycine 
B)  phenylalanine 
C)  proline 
D)  tryptophan 
A)  glycine 
B)  phenylalanine 
C)  proline 
D)  tryptophan

Question 2

Which of the following statements is true?

Accepted Answer

A)  The terms mutagen and carcinogen are synonyms. 
B)  All mutagens are carcinogens. 
C)  Some mutagens are carcinogens. 
D)  Carcinogens and mutagens are completely separate types of materials. 
A)  The terms mutagen and carcinogen are synonyms. 
B)  All mutagens are carcinogens. 
C)  Some mutagens are carcinogens. 
D)  Carcinogens and mutagens are completely separate types of materials.

Question 3

Examine the following diagram.  
-Which number in the diagram represents a polymerase?

Accepted Answer

A)  1 
B)  2 
C)  3 
D)  4 
A)  1 
B)  2 
C)  3 
D)  4

Question 4

Examine the following diagram.  
-Consider the following generalized reaction.   This reaction occurs when the R group (shown in the box) is a hydrogen atom (-H). Another reaction occurs when the R group is -CH3. Which of the following correctly compares these two reactions?

Accepted Answer

A)  Both use the same enzyme but the structure to which the amino acid is bonded is different. 
B)  Both use a different enzyme but the structure to which the amino acid is bonded is the same. 
C)  Both use the same enzyme and the same structure to which the amino acid is bonded. 
D)  Both use a different enzyme and a different structure to which the amino acid is bonded. 
A)  Both use the same enzyme but the structure to which the amino acid is bonded is different. 
B)  Both use a different enzyme but the structure to which the amino acid is bonded is the same. 
C)  Both use the same enzyme and the same structure to which the amino acid is bonded. 
D)  Both use a different enzyme and a different structure to which the amino acid is bonded.

Question 5

Which of the following is true?

Accepted Answer

A)  There is a single promoter for all genes. 
B)  There are a few promoters, but each is a promoter for many genes. 
C)  There are many promoters and each is a promoter for a few genes. 
D)  Each gene has a unique promoter. 
A)  There is a single promoter for all genes. 
B)  There are a few promoters, but each is a promoter for many genes. 
C)  There are many promoters and each is a promoter for a few genes. 
D)  Each gene has a unique promoter.

Question 6

Why are genetic diseases more likely in the offspring of closely related parents than in the general population?

Accepted Answer

A)  There is a greater likelihood that one parent carries a dominant gene for a disease. 
B)  There is a greater likelihood that both parents carry a dominant gene for a disease. 
C)  There is a greater likelihood that one parent carries a recessive gene for a disease. 
D)  There is a greater likelihood that both parents carry a recessive gene for a disease. 
A)  There is a greater likelihood that one parent carries a dominant gene for a disease. 
B)  There is a greater likelihood that both parents carry a dominant gene for a disease. 
C)  There is a greater likelihood that one parent carries a recessive gene for a disease. 
D)  There is a greater likelihood that both parents carry a recessive gene for a disease.

Question 7

Which of the following is true during transcription?

Accepted Answer

A)  Both strands of DNA serve as a template for RNA. 
B)  Only the antisense strand of DNA serves as a template for RNA. 
C)  Only the sense strand of DNA serves as a template for RNA. 
D)  Transcription involves merging information from both strands of DNA. 
A)  Both strands of DNA serve as a template for RNA. 
B)  Only the antisense strand of DNA serves as a template for RNA. 
C)  Only the sense strand of DNA serves as a template for RNA. 
D)  Transcription involves merging information from both strands of DNA.

Question 8

Approximately how often does an error occur during DNA replication?

Accepted Answer

A)  1 in a million 
B)  1 in a 10 million 
C)  1 in a billion 
D)  1 in 10 billion 
A)  1 in a million 
B)  1 in a 10 million 
C)  1 in a billion 
D)  1 in 10 billion

Question 9

Which of the following is the mechanism of peptide bond formation during protein synthesis?

Accepted Answer

A)  Nucleophilic attack on the carbon of a carbonyl group by an amino group. 
B)  Nucleophilic attack on the nitrogen of an amino group by the carbon of a carbonyl group. 
C)  Nucleophilic attack on the nitrogen of an amino group by the oxygen of a carbonyl group. 
D)  Nucleophilic attack on the oxygen of a carbonyl group by an amino group. 
A)  Nucleophilic attack on the carbon of a carbonyl group by an amino group. 
B)  Nucleophilic attack on the nitrogen of an amino group by the carbon of a carbonyl group. 
C)  Nucleophilic attack on the nitrogen of an amino group by the oxygen of a carbonyl group. 
D)  Nucleophilic attack on the oxygen of a carbonyl group by an amino group.

Question 10

Which of the following enzymes is involved in adding the new amino acid to the growing protein?

Accepted Answer

A)  amididase 
B)  peptidyl synthetase 
C)  peptidyl transferase 
D)  ribosomal synthetase 
A)  amididase 
B)  peptidyl synthetase 
C)  peptidyl transferase 
D)  ribosomal synthetase

Question 11

During elongation how many of the general transcription factors remain with the RNA polymerase?

Accepted Answer

A)  0 
B)  1 
C)  2 
D)  3 
A)  0 
B)  1 
C)  2 
D)  3

Question 12

Which of the following is not involved in regulating control at the transcriptional level?

Accepted Answer

A)  enhancers 
B)  promoters 
C)  response elements 
D)  tRNAs 
A)  enhancers 
B)  promoters 
C)  response elements 
D)  tRNAs

Question 13

As a protein is synthesized the amino acid to be added is brought by its aminoacyl-tRNA to which of the following?

Accepted Answer

A)  the A site 
B)  the E site 
C)  the P site 
D)  the S site 
A)  the A site 
B)  the E site 
C)  the P site 
D)  the S site

Question 14

Pol II has how many different forms (conformations)?

Accepted Answer

A)  1 
B)  2 
C)  3 
D)  4 
A)  1 
B)  2 
C)  3 
D)  4

Question 15

One of the codons for histidine is 5'CAU3'. What is the anticodon for this codon?

Accepted Answer

A)  5'UAC3' 
B)  5'AUG3'. 
C)  5'AUG3' 
D)  5'CAU3'. 
A)  5'UAC3' 
B)  5'AUG3'. 
C)  5'AUG3' 
D)  5'CAU3'.

Question 16

Which of the following has a sequence that serves as a template for the RNA being produced?

Accepted Answer

A)  the DNA coding strand 
B)  the DNA (−) strand 
C)  the DNA (+ ) strand 
D)  the DNA sense strand 
A)  the DNA coding strand 
B)  the DNA (−) strand 
C)  the DNA (+ ) strand 
D)  the DNA sense strand

Question 17

Where in the gene is the promoter located?

Accepted Answer

A)  in the exons 
B)  in the introns 
C)  in the regulatory portion 
D)  It can be in any of these. 
A)  in the exons 
B)  in the introns 
C)  in the regulatory portion 
D)  It can be in any of these.

Question 18

RNA polymerase I (pol I) catalyzes the formation of which type of RNA?

Accepted Answer

A)  mRNA 
B)  rRNA 
C)  snRNA 
D)  tRNA 
A)  mRNA 
B)  rRNA 
C)  snRNA 
D)  tRNA

Question 19

Which of the following is involved in making the DNA less dense and more accessible?

Accepted Answer

A)  acetylase 
B)  helicase 
C)  binding proteins 
D)  polymerases 
A)  acetylase 
B)  helicase 
C)  binding proteins 
D)  polymerases

Question 20

A single gene can result in the formation of more than one protein as a result of which of the following?

Accepted Answer

A)  genetic doubling 
B)  gene splicing 
C)  multigenomics 
D)  none of these 
A)  genetic doubling 
B)  gene splicing 
C)  multigenomics 
D)  none of these

Exam 26: Gene Expression and Protein Synthesis

Which amino acid other than methionine is coded for by only a single codon?

Which of the following statements is true?

Examine the following diagram. -Which number in the diagram represents a polymerase?

Examine the following diagram. -Consider the following generalized reaction. This reaction occurs when the R group (shown in the box) is a hydrogen atom (-H). Another reaction occurs when the R group is -CH3. Which of the following correctly compares these two reactions?

Which of the following is true?

Why are genetic diseases more likely in the offspring of closely related parents than in the general population?

Which of the following is true during transcription?

Approximately how often does an error occur during DNA replication?

Which of the following is the mechanism of peptide bond formation during protein synthesis?

Which of the following enzymes is involved in adding the new amino acid to the growing protein?

During elongation how many of the general transcription factors remain with the RNA polymerase?

Which of the following is not involved in regulating control at the transcriptional level?

As a protein is synthesized the amino acid to be added is brought by its aminoacyl-tRNA to which of the following?

Pol II has how many different forms (conformations)?

One of the codons for histidine is 5'CAU3'. What is the anticodon for this codon?

Which of the following has a sequence that serves as a template for the RNA being produced?

Where in the gene is the promoter located?

RNA polymerase I (pol I) catalyzes the formation of which type of RNA?

Which of the following is involved in making the DNA less dense and more accessible?

A single gene can result in the formation of more than one protein as a result of which of the following?

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Examine the following diagram. -Consider the following generalized reaction. This reaction occurs when the R group (shown in the box) is a hydrogen atom (-H). Another reaction occurs when the R group is -CH₃. Which of the following correctly compares these two reactions?