Question 1

Which observation is not evidence that supports the theory that mitochondria and chloroplasts originate from symbiotic bacteria?

Accepted Answer

A)  Genes for both mitochondrial and chloroplast RNA polymerase are encoded in the DNA of these organelles. 
B)  Both mitochondria and chloroplasts are about the same size as bacterial cells. 
C)  Chloroplast RNA polymerase is similar in sequence to that of cyanobacteria. 
D)  Both mitochondria and chloroplasts have their own DNA. 
A)  Genes for both mitochondrial and chloroplast RNA polymerase are encoded in the DNA of these organelles. 
B)  Both mitochondria and chloroplasts are about the same size as bacterial cells. 
C)  Chloroplast RNA polymerase is similar in sequence to that of cyanobacteria. 
D)  Both mitochondria and chloroplasts have their own DNA.

Question 2

Which statement is true about the relative number of accessory proteins necessary for RNA polymerization in eukaryotes versus E. coli?

Accepted Answer

A)  Eukaryotes require many more accessory proteins. 
B)  They require about the same number of accessory proteins. 
C)  Eukaryotes require far fewer accessory proteins. 
D)  The number required varies widely by species. Some eukaryotes require less than E. coli and some require more. 
A)  Eukaryotes require many more accessory proteins. 
B)  They require about the same number of accessory proteins. 
C)  Eukaryotes require far fewer accessory proteins. 
D)  The number required varies widely by species. Some eukaryotes require less than E. coli and some require more.

Question 3

Which of the following is true for the unwinding of the DNA helix and the synthesis of a short stretch of RNA?

Accepted Answer

A)  The process requires a helicase and a primase as in DNA replication. 
B)  In transcription, these steps proceed via an RNA polymerase holoenzyme. 
C)  The unwinding and subsequent synthesis above serve as a primer for chain elongation. 
D)  All of the above 
A)  The process requires a helicase and a primase as in DNA replication. 
B)  In transcription, these steps proceed via an RNA polymerase holoenzyme. 
C)  The unwinding and subsequent synthesis above serve as a primer for chain elongation. 
D)  All of the above

Question 4

RNA polymerase requires a high-precision fit when catalyzing the formation of a new phosphodiester linkage.

Accepted Answer

A) True 
 B)False

Question 5

The genes encoding the chloroplast RNA polymerase are not similar in sequence to those of RNA polymerase in cyanobacteria.

Accepted Answer

A) True 
 B)False

Question 6

All housekeeping genes have weak promotors and are regulated to maintain their gene products at constant low level concentrations.

Accepted Answer

A) True 
 B)False

Question 7

TATA binding protein is the only transcription factor common among all eukaryotic RNA polymerases.

Accepted Answer

A) True 
 B)False

Question 8

Characteristics of ligands involved in transcription include:

Accepted Answer

A)  They can modify the function of repressors and activators. 
B)  They are considered inducers when they bind to repressors and activate them. 
C)  They are considered corepressors when they bind to repressors and inactivate them. 
D)  All of the above 
A)  They can modify the function of repressors and activators. 
B)  They are considered inducers when they bind to repressors and activate them. 
C)  They are considered corepressors when they bind to repressors and inactivate them. 
D)  All of the above

Question 9

The purpose of the GTP cap on mRNA is .

Accepted Answer

A)  to prevent the formation of hairpin loops 
B)  to serve as a site for binding to the ribosome 
C)  to assist in the transport of mRNA out of the nucleus 
D)  to prevent exonuclease attack 
A)  to prevent the formation of hairpin loops 
B)  to serve as a site for binding to the ribosome 
C)  to assist in the transport of mRNA out of the nucleus 
D)  to prevent exonuclease attack

Question 10

Which subunit of the E. coli core RNA polymerase a2bbʹw) contributes to DNA binding?

Accepted Answer

A)  a 
B)  b 
C)  bʹ 
D)  w 
A)  a 
B)  b 
C)  bʹ 
D)  w

Question 11

Which is not a property of RNA polymerase?

Accepted Answer

A)  polymerizes in the 5ʹ → 3ʹ direction 
B)  catalyzes the formation of phosphodiester linkages 
C)  polymerizes a reaction assisted by pyrophosphate hydrolysis 
D)  has exonuclease proof-reading activity 
A)  polymerizes in the 5ʹ → 3ʹ direction 
B)  catalyzes the formation of phosphodiester linkages 
C)  polymerizes a reaction assisted by pyrophosphate hydrolysis 
D)  has exonuclease proof-reading activity

Question 12

Constitutive genes

Accepted Answer

A)  have products that are maintained at constant levels. 
B)  are genes expressed by all cells. 
C)  are transcribed continuously. 
D)  All of the above 
E)  None of the above 
A)  have products that are maintained at constant levels. 
B)  are genes expressed by all cells. 
C)  are transcribed continuously. 
D)  All of the above 
E)  None of the above

Question 13

Rho-dependent termination

Accepted Answer

A)  is due to destabilization of the RNA-DNA hybrid. 
B)  is due to indirect contact between the transcription complex and rho as rho binds RNA. 
C)  may cause the RNA polymerase to bind to template DNA. 
D)  All of the above 
A)  is due to destabilization of the RNA-DNA hybrid. 
B)  is due to indirect contact between the transcription complex and rho as rho binds RNA. 
C)  may cause the RNA polymerase to bind to template DNA. 
D)  All of the above

Question 14

Protein X is found to bind to a certain geneʹs promoter only when substance A is not present. The gene can be transcribed in the presence of both X and A. It is not transcribed in the presence of X alone. Protein X is a/an . Substance A is a/an .

Accepted Answer

A)  repressor; inducer 
B)  repressor; corepressor 
C)  activator; inducer 
D)  activator; corepressor 
A)  repressor; inducer 
B)  repressor; corepressor 
C)  activator; inducer 
D)  activator; corepressor

Question 15

Transcription is the process by which the information in mRNA molecules is interpreted and the appropriate proteins synthesized.

Accepted Answer

A) True 
 B)False

Which observation is not evidence that supports the theory that mitochondria and chloroplasts originate from symbiotic bacteria?

Which statement is true about the relative number of accessory proteins necessary for RNA polymerization in eukaryotes versus E. coli?

Which of the following is true for the unwinding of the DNA helix and the synthesis of a short stretch of RNA?

RNA polymerase requires a high-precision fit when catalyzing the formation of a new phosphodiester linkage.

The genes encoding the chloroplast RNA polymerase are not similar in sequence to those of RNA polymerase in cyanobacteria.

All housekeeping genes have weak promotors and are regulated to maintain their gene products at constant low level concentrations.

TATA binding protein is the only transcription factor common among all eukaryotic RNA polymerases.

Characteristics of ligands involved in transcription include:

The purpose of the GTP cap on mRNA is .

Which subunit of the E. coli core RNA polymerase a₂bbʹw) contributes to DNA binding?

Which is not a property of RNA polymerase?

Constitutive genes

Rho-dependent termination

Protein X is found to bind to a certain geneʹs promoter only when substance A is not present. The gene can be transcribed in the presence of both X and A. It is not transcribed in the presence of X alone. Protein X is a/an . Substance A is a/an .

Transcription is the process by which the information in mRNA molecules is interpreted and the appropriate proteins synthesized.

Introduction to Biochemistry

Water

Amino Acids and the Primary Structures of Proteins

Proteins: Three-Dimensional Structure and Function

Properties of Enzymes

Mechanisms of Enzymes

Coenzymes and Vitamins

Carbohydrates

Lipids and Membranes

Introduction to Metabolism

Glycolysis

Gluconeogenesis, the Pentose Phosphate Pathway, and Glycogen Metabolism

The Citric Acid Cycle

Electron Transport and Oxidative Phosphorylation

Photosynthesis

Lipid Metabolism

Amino Acid Metabolism

Nucleotide Metabolism

Nucleic Acids

Dna Replication, Repair, and Recombination

Protein Synthesis

Recombinant Dna Technology

Filters

Exam 21: Transcription and Rna Processing

Which observation is not evidence that supports the theory that mitochondria and chloroplasts originate from symbiotic bacteria?

Which statement is true about the relative number of accessory proteins necessary for RNA polymerization in eukaryotes versus E. coli?

Which of the following is true for the unwinding of the DNA helix and the synthesis of a short stretch of RNA?

RNA polymerase requires a high-precision fit when catalyzing the formation of a new phosphodiester linkage.

The genes encoding the chloroplast RNA polymerase are not similar in sequence to those of RNA polymerase in cyanobacteria.

All housekeeping genes have weak promotors and are regulated to maintain their gene products at constant low level concentrations.

TATA binding protein is the only transcription factor common among all eukaryotic RNA polymerases.

Characteristics of ligands involved in transcription include:

The purpose of the GTP cap on mRNA is .

Which subunit of the E. coli core RNA polymerase a2bbʹw) contributes to DNA binding?

Which is not a property of RNA polymerase?

Constitutive genes

Rho-dependent termination

Protein X is found to bind to a certain geneʹs promoter only when substance A is not present. The gene can be transcribed in the presence of both X and A. It is not transcribed in the presence of X alone. Protein X is a/an . Substance A is a/an .

Transcription is the process by which the information in mRNA molecules is interpreted and the appropriate proteins synthesized.

Introduction to Biochemistry

Water

Amino Acids and the Primary Structures of Proteins

Proteins: Three-Dimensional Structure and Function

Properties of Enzymes

Mechanisms of Enzymes

Coenzymes and Vitamins

Carbohydrates

Lipids and Membranes

Introduction to Metabolism

Glycolysis

Gluconeogenesis, the Pentose Phosphate Pathway, and Glycogen Metabolism

The Citric Acid Cycle

Electron Transport and Oxidative Phosphorylation

Photosynthesis

Lipid Metabolism

Amino Acid Metabolism

Nucleotide Metabolism

Nucleic Acids

Dna Replication, Repair, and Recombination

Protein Synthesis

Recombinant Dna Technology

Filters

Which subunit of the E. coli core RNA polymerase a₂bbʹw) contributes to DNA binding?