Question 1

How does the lac repressor find its binding site on DNA?

Accepted Answer

The lac repressor bi

Question 2

Bacterial cells produce a truncated trp mRNA when cellular levels of tryptophan are __________.

Accepted Answer

The answer of Bacterial cells produce a truncated trp mRNA...

Question 3

Symmetry matching (an inverted repeat)is a common theme in

Accepted Answer

A)  DNA-protein interactions. 
B)  mRNA modification signals. 
C)  ribosome binding to DNA. 
D)  tRNA recognition. 
E)  None of the answers is correct. 
A)  DNA-protein interactions. 
B)  mRNA modification signals. 
C)  ribosome binding to DNA. 
D)  tRNA recognition. 
E)  None of the answers is correct.

Question 4

What compounds are released by one prokaryote to communicate with others in the community?

Accepted Answer

A)  quorum sensors 
B)  autoinducers 
C)  biofilms 
D)  attenuators 
E)  None of the answers is correct. 
A)  quorum sensors 
B)  autoinducers 
C)  biofilms 
D)  attenuators 
E)  None of the answers is correct.

Question 5

How do helix-turn-helix motifs interact with DNA?

Accepted Answer

The first of the two helices b

Question 6

The λ repressor protein promotes transcription of ________________ encoded by the virus when λ repressor levels are relatively low.

Accepted Answer

λ represso

Question 7

The lac operon contains the gene(s)for the protein(s)

Accepted Answer

A)  β-galactosidase. 
B)  permease. 
C)  transacetylase. 
D)  β-galactosidase and permease 
E)  All the answers are correct. 
A)  β-galactosidase. 
B)  permease. 
C)  transacetylase. 
D)  β-galactosidase and permease 
E)  All the answers are correct.

Question 8

The pur repressor behaves __________________ to that of the lac repressor.

Accepted Answer

in an oppo

Question 9

Which of the following conditions leads to the lysogenic state?

Accepted Answer

A)  repressor high, Cro high 
B)  repressor low, Cro low 
C)  repressor high, Cro low 
D)  repressor low, Cro high 
E)  None of the answers is correct. 
A)  repressor high, Cro high 
B)  repressor low, Cro low 
C)  repressor high, Cro low 
D)  repressor low, Cro high 
E)  None of the answers is correct.

Exam 31: The Control of Gene Expression in Prokaryotes

How does the lac repressor find its binding site on DNA?

Bacterial cells produce a truncated trp mRNA when cellular levels of tryptophan are __________.

Symmetry matching (an inverted repeat)is a common theme in

What compounds are released by one prokaryote to communicate with others in the community?

How do helix-turn-helix motifs interact with DNA?

The λ repressor protein promotes transcription of ________________ encoded by the virus when λ repressor levels are relatively low.

The lac operon contains the gene(s)for the protein(s)

The pur repressor behaves __________________ to that of the lac repressor.

Which of the following conditions leads to the lysogenic state?

Biochemistry: An Evolving Science

Protein Composition and Structure

Exploring Proteins and Proteomes

DNA, RNA, and the Flow of Genetic Information

Exploring Genes and Genomes

Exploring Evolution and Bioinformatics

Hemoglobin: a Portrait of a Protein in Action

Enzymes: Basic Concepts and Kinetics

Catalytic Strategies

Regulatory Strategies

Carbohydrates

Lipids and Cell Membranes

Membrane Channels and Pumps

Signal-Transduction Pathways

Metabolism: Basic Concepts and Design

Glycolysis and Gluconeogenesis

The Citric Acid Cycle

Oxidative Phosphorylation

The Light Reactions of Photosynthesis

The Calvin Cycle and the Pentose Phosphate Pathway

Glycogen Metabolism

Fatty Acid Metabolism

Protein Turnover and Amino Acid Catabolism

The Biosynthesis of Amino Acids

Nucleotide Biosynthesis

Biosynthesis of Membrane Lipids and Steroids

The Integration of Metabolism

DNA Replication, repair, and Recombination

RNA Synthesis and Processing

Protein Synthesis

The Control of Gene Expression in Eukaryotes

Sensory Systems

The Immune System

Molecular Motors

Drug Development

Filters