Question 1

In which of the following scenarios is a silent mutation least likely?

Accepted Answer

A) change in a sequence in the 5' UTR 
B) change in a sequence the 3' UTR 
C) change in a sequence in an exon 
D) change in the sequence in the promoter 
E) change in a sequence in an intron 
A) change in a sequence in the 5' UTR 
B) change in a sequence the 3' UTR 
C) change in a sequence in an exon 
D) change in the sequence in the promoter 
E) change in a sequence in an intron C

Question 2

Identify the amino acid in the following figure.

Accepted Answer

A) alanine 
B) valine 
C) glycine 
D) leucine 
E) serine   
A) alanine 
B) valine 
C) glycine 
D) leucine 
E) serine   C

Question 3

Sickle cell mutation is caused by a change in the sixth codon of the nontemplate strand of DNA lead.

Accepted Answer

A) True 
 B)False  True

Question 4

Which of the following would result in a block of transcription of RNA?

Accepted Answer

A) ATP 
B) dCTP 
C) dGTP 
D) dTTP 
E) none of the choices are correct. 
A) ATP 
B) dCTP 
C) dGTP 
D) dTTP 
E) none of the choices are correct.

Question 5

A new mutant cell line was accidentally created in the lab.This mutant was found to be deficient in the enzyme aminoacyl-tRNA synthetase.Which of the following would most likely be observed in this cell line?

Accepted Answer

A) No tRNA molecules would be present. 
B) tRNA molecules would contain no anticodons. 
C) Most tRNA molecules would not be charged with amino acids. 
D) Protein synthesis would increase. 
E) None of the choices are correct. 
A) No tRNA molecules would be present. 
B) tRNA molecules would contain no anticodons. 
C) Most tRNA molecules would not be charged with amino acids. 
D) Protein synthesis would increase. 
E) None of the choices are correct.

Question 6

The promoter sequence does not play a critical role in which of the following stages in transcription?

Accepted Answer

A) initiation 
B) termination 
C) elongation 
D) polymerase binding 
E) both elongation and termination 
A) initiation 
B) termination 
C) elongation 
D) polymerase binding 
E) both elongation and termination

Question 7

The peptide bond is formed by the enzyme known as ____________ _____________.

Accepted Answer

peptidyl t

Question 8

The formation of a peptide bond can be classified as a

Accepted Answer

A) reduction reaction. 
B) oxidation reaction. 
C) condensation reaction. 
D) redox reaction. 
E) none of the choices are correct. 
A) reduction reaction. 
B) oxidation reaction. 
C) condensation reaction. 
D) redox reaction. 
E) none of the choices are correct.

Question 9

mRNA encodes a gene.

Accepted Answer

A) True 
 B)False

Question 10

The shape of most polypeptides is spherical or ___________.

Accepted Answer

The answer of The shape of most polypeptides is spherical...

Question 11

The noncoding strand of a gene is the same as the antisense strand.

Accepted Answer

A) True 
 B)False

Question 12

In prokaryotes,the Shine Dalgarno sequence attracts ribosomes to the AUG site.

Accepted Answer

A) True 
 B)False

Question 13

The enzyme that directs transcription is called RNA ___________________.

Accepted Answer

The answer of The enzyme that directs transcription is called...

Question 14

An amino group,a carboxyl group,and a hydrogen are found in all amino acids.

Accepted Answer

A) True 
 B)False

Question 15

Which of the following can classified as a dehydration reaction?

Accepted Answer

A) phosphodiester bond formation in RNA 
B) phosphodiester bond formation in rRNA 
C) peptide bond formation 
D) phosphodiester bond formation in mRNA 
E) all of the choices are correct. 
A) phosphodiester bond formation in RNA 
B) phosphodiester bond formation in rRNA 
C) peptide bond formation 
D) phosphodiester bond formation in mRNA 
E) all of the choices are correct.

Question 16

Which of the following features is common to DNA,RNA,and proteins?

Accepted Answer

A) They contain amino acids. 
B) They contain nucleotides. 
C) They contain uracil. 
D) They are polymers. 
E) They are found in vesicles. 
A) They contain amino acids. 
B) They contain nucleotides. 
C) They contain uracil. 
D) They are polymers. 
E) They are found in vesicles.

Question 17

Which of the following is not required during the elongation phase of translation in bacteria?

Accepted Answer

A) EF-Tu 
B) peptidyl transferease 
C) GTP 
D) 70 S ribosome 
E) ribonuclease 
A) EF-Tu 
B) peptidyl transferease 
C) GTP 
D) 70 S ribosome 
E) ribonuclease

Question 18

A segment of DNA is considered upstream when it is located on the 5' end of the start site.

Accepted Answer

A) True 
 B)False

Question 19

Which of the following is not considered part of a transcriptional unit?

Accepted Answer

A) 5' UTR 
B) 3' UTR 
C) introns 
D) exons 
E) none of the choices are correct. 
A) 5' UTR 
B) 3' UTR 
C) introns 
D) exons 
E) none of the choices are correct.

Question 20

RNA polymerase links together nucleotides in the RNA molecule in the 3' to 5' direction,but reads the information in DNA in the 5' to 3' direction.

Accepted Answer

A) True 
 B)False

Exam 3: An Introduction to Gene Function

In which of the following scenarios is a silent mutation least likely?

Identify the amino acid in the following figure.

Sickle cell mutation is caused by a change in the sixth codon of the nontemplate strand of DNA lead.

Which of the following would result in a block of transcription of RNA?

A new mutant cell line was accidentally created in the lab.This mutant was found to be deficient in the enzyme aminoacyl-tRNA synthetase.Which of the following would most likely be observed in this cell line?

The promoter sequence does not play a critical role in which of the following stages in transcription?

The peptide bond is formed by the enzyme known as ____________ _____________.

The formation of a peptide bond can be classified as a

mRNA encodes a gene.

The shape of most polypeptides is spherical or ___________.

The noncoding strand of a gene is the same as the antisense strand.

In prokaryotes,the Shine Dalgarno sequence attracts ribosomes to the AUG site.

The enzyme that directs transcription is called RNA ___________________.

An amino group,a carboxyl group,and a hydrogen are found in all amino acids.

Which of the following can classified as a dehydration reaction?

Which of the following features is common to DNA,RNA,and proteins?

Which of the following is not required during the elongation phase of translation in bacteria?

A segment of DNA is considered upstream when it is located on the 5' end of the start site.

Which of the following is not considered part of a transcriptional unit?

RNA polymerase links together nucleotides in the RNA molecule in the 3' to 5' direction,but reads the information in DNA in the 5' to 3' direction.

A Brief History

The Molecular Nature of Genes

Molecular Cloning Methods

Molecular Tools for Studying Genes and Gene Activity

The Mechanism of Transcription in Bacteria

Operons: Fine Control of Bacterial Transcription

Major Shifts in Bacterial Transcription

Dna-Protein Interactions in Bacteria

Eukaryotic Rna Polymerases and Their Promoters

General Transcription Factors in Eukaryotes

Transcription Activators in Eukaryotes

Chromatin Structure and Its Effect on Transcription

Rna Processing I: Splicing

Rna Processing II: Capping and Polyadenylation

Rna Processing: Other Post-Transcriptional Events

The Mechanism of Translation I: Initiation

The Mechanism of Translation II: Elongation and Termination

Ribosomes and Transfer Rna

Dna Replication,damage and Repair

Dna Replication II: Detailed Mechanism

Homologous Recombination

Transposition

Introduction to Genomics: Dna Sequencing on a Genomic Scale

Genomics II: Functional Genomics,proteomics and Bioinformatics

Filters

The peptide bond is formed by the enzyme known as _.