Which figure shows a chromatin structure that is most likely from a gene that is epigenetically silenced? A B A ОВ

Describe how methylation and acetylation of the histones changes gene expression in eukaryotes. What groups are added? How do these processes physically affect chromatin structure? Silencing or Enhancing expression?

If an organism's cells were to not want a specific sequence of DNA transcribed for a long period of time, which of the following processes below would most likely allow for this to happen? O DNA acetylation O DNA methylation O histone methylation O histone acetylation

The diagram shown represents the coding strand of the myosin gene. Mutations in myosin can lead to muscle defects during development. Using what you know about how mutations can affect transcriptional and post-transcriptional regulation, match the results shown on the Northern (mature mRNA) to the mutations shown. The N lane shows the size and amount expected for non-mutated myosin mRNA. All samples were loaded at the top (-) side of the gel. Part 1. Which lane or lanes on the gel could be the result of mutation A? ТАТА AUG UAA Only known regulatory region TSS Mutation B: Mutation C. 3 nucleotides 20 nucleotides deleted A: 5-base deletion changed 1 2 4 5 lane 1 lane 2 lane 3 lane 4 lane 5 OOO0O

Which of the following mutations in the protein-coding region of a gene is more likely to lead to complete loss of function of the encoded protein: an insertion of six nucleotides or a deletion of two nucleotides? Briefly explain your answer.

In skin cells, a gene is never transcribed. Give two ways this could occur.

How would each of the following types of mutations affect proteinfunction or the amount of functional protein that is expressed froma gene?A. Nonsense mutationB. Missense mutationC. Up promoter mutationD. Mutation that affects splicing

Explain the degeneracy of the genetic code. What is the wobble in codon-anticodon recognition