Question 1

Show how glutamine interacts with an A-T base pair as seen in the cI and Cro repressors.

Accepted Answer

The answer of Show how glutamine interacts with an A-T...

Question 2

Which of the following structural features of the trp leader sequence, trpL, explains why transcription of the full trp operon is prevented even when the repressor is not bound to the operon?

Accepted Answer

A) an A-rich region of the template strand acts as a factor-independent transcription terminator 
B) there is a stop codon present as the 15th codon of the trpL sequence 
C) the ribosome is stalled at two adjacent Trp codons under conditions where Trp is low 
D) a charged tRNATrp binds to one of the adjacent Trp codons to block ribosomal movement 
E) none of the above 
A) an A-rich region of the template strand acts as a factor-independent transcription terminator 
B) there is a stop codon present as the 15th codon of the trpL sequence 
C) the ribosome is stalled at two adjacent Trp codons under conditions where Trp is low 
D) a charged tRNATrp binds to one of the adjacent Trp codons to block ribosomal movement 
E) none of the above

Question 3

Which of the following is the true inducer that binds to the lac repressor in vivo?

Accepted Answer

A) lactose 
B) glucose 
C) galactose 
D) isopropyl-$\beta$-thiogalactoside 
E) allolactose 
A) lactose 
B) glucose 
C) galactose 
D) isopropyl-$\beta$-thiogalactoside 
E) allolactose

Question 4

If an miRNA is completely complementary to an mRNA, what is the result of the pairing of these two molecules?

Accepted Answer

A) rapid translation of the mRNA 
B) repeated translation as the miRNA prevents destruction of the mRNA 
C) slowed translation of the mRNA 
D) degradation of the mRNA 
E) none of the above 
A) rapid translation of the mRNA 
B) repeated translation as the miRNA prevents destruction of the mRNA 
C) slowed translation of the mRNA 
D) degradation of the mRNA 
E) none of the above

Question 5

In prokaryotes, DNA methylation occurs on ______ while in eukaryotes, methylation occurs on _______.

Accepted Answer

A) adenine; thymine 
B) adenine; cytosine 
C) guanine; adenine 
D) guanine; thymine 
E) guanine; cytosine 
A) adenine; thymine 
B) adenine; cytosine 
C) guanine; adenine 
D) guanine; thymine 
E) guanine; cytosine

Show how glutamine interacts with an A-T base pair as seen in the cI and Cro repressors.

Which of the following structural features of the trp leader sequence, trpL, explains why transcription of the full trp operon is prevented even when the repressor is not bound to the operon?

Which of the following is the true inducer that binds to the lac repressor in vivo?

If an miRNA is completely complementary to an mRNA, what is the result of the pairing of these two molecules?

In prokaryotes, DNA methylation occurs on while in eukaryotes, methylation occurs on _.

The Scope of Biochemistry

The Matrix 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

Contractile Proteins and Molecular Motors

Carbohydrates: Sugars, Saccharides, Glycans

Lipids, Membranes and Cellular Transport

Enzymes: Biological Catalysts

Chemical Logic of Metabolism

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

Citric Acid Cycle and Glyoxylate Cycle

Electron Transport, Oxidative Phosphorylation, and Oxygen Metabolism

Photosynthesis

Lipid Metabolism I: Fatty Acids, Triacylglycerols, and Lipoproteins

Interorgan and Intracellular Coordination of Energy Metabolism in Vertebrates

Lipid Metabolism Ii: Membrane Lipids, Steroids, Isoprenoids, and Eicosanoids

Metabolism of Nitrogenous Compounds I: Principles of Biosynthesis, Utilization, and Turnover

Metabolism of Nitogenous Compounds II: Amino Acids, Porphyrins, and Neurotransmitters

Nucleotide Metabolism

Mechanisms of Signal Transduction

Genes, Genomes and Chromosomes

DNA Replication

DNA Restructuring: Repair, Recombination, Rearrangement, Amplification

Information Readout: Transcription and Post-Transcriptional Processing

Information Decoding: Translation and Post-Translational Protein Processing

Filters

Exam 29: Regulation of Gene Expression

Show how glutamine interacts with an A-T base pair as seen in the cI and Cro repressors.

Which of the following structural features of the trp leader sequence, trpL, explains why transcription of the full trp operon is prevented even when the repressor is not bound to the operon?

Which of the following is the true inducer that binds to the lac repressor in vivo?

If an miRNA is completely complementary to an mRNA, what is the result of the pairing of these two molecules?

In prokaryotes, DNA methylation occurs on ______ while in eukaryotes, methylation occurs on _______.

The Scope of Biochemistry

The Matrix 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

Contractile Proteins and Molecular Motors

Carbohydrates: Sugars, Saccharides, Glycans

Lipids, Membranes and Cellular Transport

Enzymes: Biological Catalysts

Chemical Logic of Metabolism

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

Citric Acid Cycle and Glyoxylate Cycle

Electron Transport, Oxidative Phosphorylation, and Oxygen Metabolism

Photosynthesis

Lipid Metabolism I: Fatty Acids, Triacylglycerols, and Lipoproteins

Interorgan and Intracellular Coordination of Energy Metabolism in Vertebrates

Lipid Metabolism Ii: Membrane Lipids, Steroids, Isoprenoids, and Eicosanoids

Metabolism of Nitrogenous Compounds I: Principles of Biosynthesis, Utilization, and Turnover

Metabolism of Nitogenous Compounds II: Amino Acids, Porphyrins, and Neurotransmitters

Nucleotide Metabolism

Mechanisms of Signal Transduction

Genes, Genomes and Chromosomes

DNA Replication

DNA Restructuring: Repair, Recombination, Rearrangement, Amplification

Information Readout: Transcription and Post-Transcriptional Processing

Information Decoding: Translation and Post-Translational Protein Processing

Filters

In prokaryotes, DNA methylation occurs on while in eukaryotes, methylation occurs on _.