Question 1

If an mRNA is hybridized to DNA and we observe loops of noncoding DNA that are not hybridized to DNA,then what might we conclude?

Accepted Answer

A) The gene and protein are collinear. 
B) The gene and protein are not collinear. 
C) The loops signify a mutation in that DNA region. 
D) No conclusions can be made. 
A) The gene and protein are collinear. 
B) The gene and protein are not collinear. 
C) The loops signify a mutation in that DNA region. 
D) No conclusions can be made. B

Question 2

Which is NOT true of ribosomes?

Accepted Answer

A) They are composed of proteins and ribosomal RNA molecules. 
B) They are made up of only ribosomal RNA molecules. 
C) They contain a small subunit and a large subunit. 
D) RNAs undergo extensive processing. 
A) They are composed of proteins and ribosomal RNA molecules. 
B) They are made up of only ribosomal RNA molecules. 
C) They contain a small subunit and a large subunit. 
D) RNAs undergo extensive processing. B

Question 3

What would the result be if a specific sigma subunit were mutated?

Accepted Answer

A) Nothing would result: sigma is not essential. 
B) RNA polymerase would still bind at specific sites,but elongation would fail. 
C) RNA polymerase would fail to initiate transcription at the promoter specific to the sigma subunit. 
D)  The core enzyme would not be stable. 
A) Nothing would result: sigma is not essential. 
B) RNA polymerase would still bind at specific sites,but elongation would fail. 
C) RNA polymerase would fail to initiate transcription at the promoter specific to the sigma subunit. 
D)  The core enzyme would not be stable. C

Question 4

The transcription unit includes three essential regions.What is the proper order of these regions?

Accepted Answer

A) terminator,RNA coding sequence,promoter 
B) RNA coding sequence,promoter,terminator 
C) promoter,RNA coding sequence,terminator 
D) RNA coding sequence,terminator,promoter 
E) promoter,terminator,RNA coding sequence 
A) terminator,RNA coding sequence,promoter 
B) RNA coding sequence,promoter,terminator 
C) promoter,RNA coding sequence,terminator 
D) RNA coding sequence,terminator,promoter 
E) promoter,terminator,RNA coding sequence

Question 5

The bacterial holoenzyme binds to which part of the promoter?

Accepted Answer

A) -10 consensus sequence 
B) -35 consensus sequence 
C) -10 and -35 consensus sequence 
D) The holoenzyme does not bind to the promoter. 
A) -10 consensus sequence 
B) -35 consensus sequence 
C) -10 and -35 consensus sequence 
D) The holoenzyme does not bind to the promoter.

Question 6

Small interfering RNA siRNAmolecules block gene expression by degrading mRNA or inhibiting transcription.Which genes do they target?

Accepted Answer

A) genes from which they were transcribed 
B) genes that they were not transcribed from 
C) random genes 
D) none of the above 
A) genes from which they were transcribed 
B) genes that they were not transcribed from 
C) random genes 
D) none of the above

Question 7

Which intron component is the first to be cleaved during the splicing process?

Accepted Answer

A) 5' splice site 
B) 3' splice site 
C) branch point 
D) depends upon the species 
A) 5' splice site 
B) 3' splice site 
C) branch point 
D) depends upon the species

Question 8

What kind of RNA functions in splicing and is associated with the spliceosome?

Accepted Answer

A) transfer RNA tRN
A)  
B) ribosomal RNA rRN
A)  
C) small nuclear RNA snRN
A)  
D) none of the above 
A) transfer RNA tRN
A)  
B) ribosomal RNA rRN
A)  
C) small nuclear RNA snRN
A)  
D) none of the above

Question 9

What is the most likely result from mutating a prokaryotic Shine-Dalgarno sequence?

Accepted Answer

A) The translated protein would have different amino acids. 
B) The mRNA would be less stable. 
C) The ribosome would not be able to bind to the mRNA. 
D) None of the above: prokaryotes do not have a Shine-Dalgarno sequence. 
A) The translated protein would have different amino acids. 
B) The mRNA would be less stable. 
C) The ribosome would not be able to bind to the mRNA. 
D) None of the above: prokaryotes do not have a Shine-Dalgarno sequence.

Question 10

Which of the following is true of RNA compared to DNA?

Accepted Answer

A) RNA and DNA use the same bases. 
B) RNA has a hydroxyl group on the 2'-carbon atom of its sugar component. 
C) Both are primarily double stranded. 
D) RNA exists in one form. 
E) RNA is more stable than DNA. 
A) RNA and DNA use the same bases. 
B) RNA has a hydroxyl group on the 2'-carbon atom of its sugar component. 
C) Both are primarily double stranded. 
D) RNA exists in one form. 
E) RNA is more stable than DNA.

Question 11

When RNA is transcribed from a gene,which strand of DNA is used?

Accepted Answer

A) the template strand 
B) the nontemplate strand 
C) RNA is transcribed from either strand at random. 
D) RNA is transcribed from either strand in a regulated manner. 
A) the template strand 
B) the nontemplate strand 
C) RNA is transcribed from either strand at random. 
D) RNA is transcribed from either strand in a regulated manner.

Question 12

In rho-dependent transcription termination,the rho factor binds to ___________.

Accepted Answer

A) mRNA 
B) DNA near the end of the transcribed region) 
C) RNA polymerase 
D) sigma subunit 
A) mRNA 
B) DNA near the end of the transcribed region) 
C) RNA polymerase 
D) sigma subunit

If an mRNA is hybridized to DNA and we observe loops of noncoding DNA that are not hybridized to DNA,then what might we conclude?

Which is NOT true of ribosomes?

What would the result be if a specific sigma subunit were mutated?

The transcription unit includes three essential regions.What is the proper order of these regions?

The bacterial holoenzyme binds to which part of the promoter?

Small interfering RNA siRNAmolecules block gene expression by degrading mRNA or inhibiting transcription.Which genes do they target?

Which intron component is the first to be cleaved during the splicing process?

What kind of RNA functions in splicing and is associated with the spliceosome?

What is the most likely result from mutating a prokaryotic Shine-Dalgarno sequence?

Which of the following is true of RNA compared to DNA?

When RNA is transcribed from a gene,which strand of DNA is used?

In rho-dependent transcription termination,the rho factor binds to ___________.

Introduction to Genetics

Chromosomes and Cellular Reproduction

Basic Principles of Heredity

Extensions and Modifications of Basic Principles

Linkage, Recombination, and Eukaryotic Gene Mapping

Bacterial and Viral Genetic Systems

Chromosome Variation

DNA: The Chemical Nature of the Gene

DNA Replication

From DNA to Proteins: Translation

Control of Gene Expression

Gene Mutations, Transposable Elements, and Dna Repair

Molecular Genetic Analysis, Biotechnology, and Genomics

Cancer Genetics

Quantitative Genetics

Population and Evolutionary Genetics

Filters

Exam 10: From DNA to Proteins: Transcription and Rna Processing

If an mRNA is hybridized to DNA and we observe loops of noncoding DNA that are not hybridized to DNA,then what might we conclude?

Which is NOT true of ribosomes?

What would the result be if a specific sigma subunit were mutated?

The transcription unit includes three essential regions.What is the proper order of these regions?

The bacterial holoenzyme binds to which part of the promoter?

Small interfering RNA siRNAmolecules block gene expression by degrading mRNA or inhibiting transcription.Which genes do they target?

Which intron component is the first to be cleaved during the splicing process?

What kind of RNA functions in splicing and is associated with the spliceosome?

What is the most likely result from mutating a prokaryotic Shine-Dalgarno sequence?

Which of the following is true of RNA compared to DNA?

When RNA is transcribed from a gene,which strand of DNA is used?

In rho-dependent transcription termination,the rho factor binds to ___________.

Introduction to Genetics

Chromosomes and Cellular Reproduction

Basic Principles of Heredity

Extensions and Modifications of Basic Principles

Linkage, Recombination, and Eukaryotic Gene Mapping

Bacterial and Viral Genetic Systems

Chromosome Variation

DNA: The Chemical Nature of the Gene

DNA Replication

From DNA to Proteins: Translation

Control of Gene Expression

Gene Mutations, Transposable Elements, and Dna Repair

Molecular Genetic Analysis, Biotechnology, and Genomics

Cancer Genetics

Quantitative Genetics

Population and Evolutionary Genetics

Filters