10 Questions
Which of the following is required for lac repressor to be made?
Functional promoter, lacZ coding region, and operator
What happens to the lacZ gene expression when there is no functional promoter?
It decreases
Which of the following is true about the lac operator and lac repressor?
They both regulate the expression of beta-galactosidase
What is the function of regulatory proteins in the lac operon?
To regulate the expression of beta-galactosidase
What is the term for a situation where multiple proteins are encoded on a single mRNA molecule?
Polycistronic
Which level of gene regulation is most common in prokaryotes?
Transcriptional
In eukaryotes, how is gene expression regulated?
At multiple levels
What is the default state of gene expression in prokaryotes?
On, like a light switch
How do regulatory proteins in prokaryotes and eukaryotes differ in complexity?
Prokaryotes have a single regulatory protein, while eukaryotes have multiple regulatory proteins
What is the function of repressors in gene regulation?
Turn transcription off
Test your understanding of the lac operon with this quiz! Explore questions about the presence of functional promoters, lacZ coding regions, and operators, as well as the production of lac repressor.
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