Multiple Choice
In the context of eukaryotic gene regulation, what term describes a gene that is expressed at a relatively constant level in most cells under normal conditions to maintain basic cellular functions?
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13. Gene Regulation in Eukaryotes
Overview of Eukaryotic Gene Regulation
Multiple Choice
In eukaryotic gene regulation, what is the most direct outcome when a gene is turned on (activated)?
A
It is transcribed into RNA (and may then be translated into a protein).
B
It is permanently removed from the genome by excision.
C
It prevents transcription of neighboring genes by binding RNA polymerase and blocking the promoter.
D
It immediately replicates its DNA sequence multiple times to increase gene copy number.
Verified step by step guidance1
Understand that gene regulation in eukaryotes primarily controls whether a gene is transcribed into RNA or not.
Recognize that when a gene is turned on (activated), the most direct molecular event is the initiation of transcription by RNA polymerase.
Recall that transcription is the process where the DNA sequence of a gene is copied into messenger RNA (mRNA).
Note that this mRNA can then be processed and eventually translated into a protein, but the immediate outcome of activation is transcription itself.
Eliminate other options by understanding that gene activation does not involve excision from the genome, blocking RNA polymerase, or immediate DNA replication of the gene.
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