Gene regulation in eukaryotic cells includes
A) activators that help RNA polymerase bind to the promoter.
B) repressors that prevent DNA polymerase from binding.
C) activation of the X chromosome.
D) degradation of nucleases by mRNA.

Question

Quizplus · Accepted Answer

Activators bind to specific sites on the DNA and help RNA polymerase bind to the promoter, leading to transcription of the gene. This is a common mechanism of gene regulation in eukaryotic cells.

Answer: B
 Repressors bind to specific sites on the DNA and prevent RNA polymerase from binding to the promoter, leading to repression of the gene. This is another common mechanism of gene regulation in eukaryotic cells.

Answer: C
 Activation of the X chromosome refers to the process by which one of the two X chromosomes in female cells is silenced to prevent overexpression of X-linked genes. This is a type of gene regulation that occurs specifically in eukaryotic cells with two X chromosomes.

Answer: D
 Degradation of nucleases by mRNA is not a mechanism of gene regulation in eukaryotic cells. Rather, mRNA is subject to degradation by nucleases, which can regulate the amount of protein produced by a gene.

Gene Regulation in Eukaryotic Cells Includes