Genes can be silenced through epigenetic changes that occur Genes can be silenced through epigenetic changes that occur at CpG islands located in RNA. at the C-terminus of histone tails. at lysines located in the nucleic acids sequence. at regulatory regions in DNA.

Possible genetic modifications that can cause epigenetic changes in gene expression include: A- all answers are correct B- histone acetylation C- chromatin remodeling D- histone variant localization  e- DNA methylation

You are studying how gene expression is regulated in the cell. For gene z, you find that while there are high levels of mRNA in the cell, there are low levels of the protein encoded by gene z. Describe a regulatory mechanism that could explain this finding that occurs after translation.

In cancerous cells, CpG islands are:   where intercalating agents are found   demethylated methylated

Which of the following mutations would not convert a proto-oncogene into an oncogene?     A translocation that places the gene at a new locus where gene expression is increased.     A mutation in the coding region that makes the protein resisitant to degradation.     Gene duplication.     A mutation in the coding region that makes the protein hyperactive.     A deletion of an enhancer that lies 3’ to the coding region.

Which of the following epigenetic changes could lead to reduced transcription of a particular gene?. Please make sure to select all correct answers

For each of these things, say whether it describes the coding sequence or the regulatory sequence. The ______________ sequence determines the order of a protein’s amino acids. The ______________ sequence attaches to transcription factors. The ______________ sequence is where RNA polymerase attaches to start transcription. The ______________ sequence includes the start and stop codons. The ______________ sequence allows the gene to be activated in some cells but not others.

Regarding noncoding RNA, which of the following statements is false?   HOTAIR RNA works as a scaffold that binds specific protein regulators at its two ends.   Many long noncoding RNAs work in epigenetic regulation of gene expression.   Most regulatory long noncoding RNAs work as trans-acting regulators.   HOTAIR RNA is produced by a gene in the HOXC homeobox gene cluster at 12q13 but can regulate multiple genes within the HOXD gene cluster on chromosome 2.   Noncoding RNAs are mostly involved in translation processes.

Explain how ncRNA uses complementary base pairing with DNA to affect gene expression.