Question 1

The physiological inducer of the lac operon is ________.

Accepted Answer

The answer of The physiological inducer of the lac operon...

Question 2

In eukaryotes RNA polymerase is only bound at promoters that are carrying out active transcription.

Accepted Answer

A) True 
 B)False

Question 3

A partial diploid containing a wild type allele for lacO and a lacO mutant that was unable to bind to the lac repressor would always express β-galactosidase.

Accepted Answer

A) True 
 B)False

Question 4

The affinity of the lac repressor for DNA ________ markedly when the inducer binds to the lac repressor.

Accepted Answer

The answer of The affinity of the lac repressor for...

Question 5

Nucleosomes very close to the transcription start site in eukaryotes tend to have a high proportion of the histone variants H3.3 and H2A.Z.

Accepted Answer

A) True 
 B)False

Question 6

Which of the following is NOT part of initiation of transcription in eukaryotes?

Accepted Answer

A)  Phosphorylation of Ser-5 in the heptad repeats in the C-terminal domain of RNA polymerase II by TF-IIH. 
B)  Unwinding of the DNA template by TF-IIH 
C)  Non-specific interactions of general transcription factors at promoters 
D)  Phosphorylation of Ser-2 in the heptad repeats in the C-terminal domain of RNA polymerase II by P-TEFb. 
E)  The binding of upstream regulatory proteins 
A)  Phosphorylation of Ser-5 in the heptad repeats in the C-terminal domain of RNA polymerase II by TF-IIH. 
B)  Unwinding of the DNA template by TF-IIH 
C)  Non-specific interactions of general transcription factors at promoters 
D)  Phosphorylation of Ser-2 in the heptad repeats in the C-terminal domain of RNA polymerase II by P-TEFb. 
E)  The binding of upstream regulatory proteins

Question 7

A set of linked genes regulated by a common mechanism is called a regulon.

Accepted Answer

A) True 
 B)False

Question 8

Chromatin modifications that tend to inhibit transcription include:

Accepted Answer

A)  methylation at lysine 9 or 27 of histone H3. 
B)  methylation at lysine 4 of histone H3. 
C)  ubiquitylation at lysine 119 of histone H3. 
D)  A, B, and C. 
E)  A and C. 
A)  methylation at lysine 9 or 27 of histone H3. 
B)  methylation at lysine 4 of histone H3. 
C)  ubiquitylation at lysine 119 of histone H3. 
D)  A, B, and C. 
E)  A and C.

Question 9

The trp operon is transcribed when the trp repressor is bound to tryptophan.

Accepted Answer

A) True 
 B)False

Question 10

Transcriptionally active chromatin usually contains ________ histones, while ________ is normally inhibitory to transcription.

Accepted Answer

acetylated

Question 11

Catabolite or glucose repression of the lac operon is a regulatory system, which depends on the levels of cAMP in the cell.

Accepted Answer

A) True 
 B)False

Question 12

Epigenetics is the heritable transmission of gene ________ patterns that does not involve a change in the DNA base sequence.

Accepted Answer

The answer of Epigenetics is the heritable transmission of gene...

The physiological inducer of the lac operon is ________.

In eukaryotes RNA polymerase is only bound at promoters that are carrying out active transcription.

A partial diploid containing a wild type allele for lacO and a lacO mutant that was unable to bind to the lac repressor would always express β-galactosidase.

The affinity of the lac repressor for DNA ________ markedly when the inducer binds to the lac repressor.

Nucleosomes very close to the transcription start site in eukaryotes tend to have a high proportion of the histone variants H3.3 and H2A.Z.

Which of the following is NOT part of initiation of transcription in eukaryotes?

A set of linked genes regulated by a common mechanism is called a regulon.

Chromatin modifications that tend to inhibit transcription include:

The trp operon is transcribed when the trp repressor is bound to tryptophan.

Transcriptionally active chromatin usually contains histones, while is normally inhibitory to transcription.

Catabolite or glucose repression of the lac operon is a regulatory system, which depends on the levels of cAMP in the cell.

Epigenetics is the heritable transmission of gene ________ patterns that does not involve a change in the DNA base sequence.

Biochemistry and the Language of Chemistry

The Chemical Foundation of Life: Weak Interactions in an Aqueous Environment

The Energetics of Life

Nucleic Acids

Introduction to Proteins: the Primary Level of Protein Structure

The Three-Dimensional Structure of Proteins

Protein Function and Evolution

Enzymes: Biological Catalysts

Carbohydrates: Sugars, Saccharides, Glycans

Lipids, Membranes, and Cellular Transport

Chemical Logic of Metabolism

Carbohydrate Metabolism: Glycolysis, Gluconeogenesis, Glycogen Metabolism, and the Pentose Phosphate Pathway

The Citric Acid Cycle

Electron Transport, Oxidative Phosphorylation, and Oxygen Metabolism

Photosynthesis

Lipid Metabolism

Interorgan and Intracellular Coordination of Energy Metabolism in Vertebrates

Amino Acid and Nitrogen Metabolism

Nucleotide Metabolism

Mechanisms of Signal Transduction

Genes, Genomes, and Chromosomes

DNA Replication

DNA Repair, Recombination, and Rearrangement

Transcription and Post-Transcriptional Processing

Information Decoding: Translation and Post-Translational Protein Processing

Filters

Exam 26: Regulation of Gene Expression

The physiological inducer of the lac operon is ________.

In eukaryotes RNA polymerase is only bound at promoters that are carrying out active transcription.

A partial diploid containing a wild type allele for lacO and a lacO mutant that was unable to bind to the lac repressor would always express β-galactosidase.

The affinity of the lac repressor for DNA ________ markedly when the inducer binds to the lac repressor.

Nucleosomes very close to the transcription start site in eukaryotes tend to have a high proportion of the histone variants H3.3 and H2A.Z.

Which of the following is NOT part of initiation of transcription in eukaryotes?

A set of linked genes regulated by a common mechanism is called a regulon.

Chromatin modifications that tend to inhibit transcription include:

The trp operon is transcribed when the trp repressor is bound to tryptophan.

Transcriptionally active chromatin usually contains ________ histones, while ________ is normally inhibitory to transcription.

Catabolite or glucose repression of the lac operon is a regulatory system, which depends on the levels of cAMP in the cell.

Epigenetics is the heritable transmission of gene ________ patterns that does not involve a change in the DNA base sequence.

Biochemistry and the Language of Chemistry

The Chemical Foundation of Life: Weak Interactions in an Aqueous Environment

The Energetics of Life

Nucleic Acids

Introduction to Proteins: the Primary Level of Protein Structure

The Three-Dimensional Structure of Proteins

Protein Function and Evolution

Enzymes: Biological Catalysts

Carbohydrates: Sugars, Saccharides, Glycans

Lipids, Membranes, and Cellular Transport

Chemical Logic of Metabolism

Carbohydrate Metabolism: Glycolysis, Gluconeogenesis, Glycogen Metabolism, and the Pentose Phosphate Pathway

The Citric Acid Cycle

Electron Transport, Oxidative Phosphorylation, and Oxygen Metabolism

Photosynthesis

Lipid Metabolism

Interorgan and Intracellular Coordination of Energy Metabolism in Vertebrates

Amino Acid and Nitrogen Metabolism

Nucleotide Metabolism

Mechanisms of Signal Transduction

Genes, Genomes, and Chromosomes

DNA Replication

DNA Repair, Recombination, and Rearrangement

Transcription and Post-Transcriptional Processing

Information Decoding: Translation and Post-Translational Protein Processing

Filters

Transcriptionally active chromatin usually contains histones, while is normally inhibitory to transcription.