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Operon Model Trivia Quiz Ch 18

The 'Operon Model Trivia' assesses understanding of gene regulation in bacteria. It covers key concepts like the operon model, roles of repressors, promoters, and corepressors, and the regulation mechanisms of the tryptophan...

Questions: 24 | Attempts: 903 | Last updated: Jul 3, 2025

Sample Question 1
What does the operon model attempt to explain?

Bacterial resistance to antibiotics

How genes move between homologous regions of DNA

The coordinated control of gene expression in bacteria

The mechanism of viral attachment to a host cell

Horizontal transmission of plant viruses

Sample Question 2
The role of a metabolite that controls a repressible operon is to

Bind to the promoter region and decrease the affinity of RNA polymerase for the promoter

Bind to the repressor protein and activate it

Bind to the repressor protein and inactivate it

Bind to the operator region and block the attachment of RNA polymerase to the promoter

Increase the production of inactive repressor proteins

Sample Question 3
The tryptophan operon is a repressible operon that is

Permanently turned on

Turned on only when typtophan is present in the growth medium

Turned on only when glucose is present in the growth medium

Turned off whenever tryptophan is added to the growth medium

Turned off only when glucose is present in the growth medium