8 Which of the following is NOT a transcriptionally represse

8. Which of the following is NOT a transcriptionally repressed genomic region?

a. telomeres       b. CpG islands   c. one mating type locus in S. cerevisiae               d. centromeres

Solution

b.CpG islands.

The CpG sites or CG sites are regions of DNA where a cytosine nucleotide occurs next to a guanine nucleotide in the linear sequence of bases along its length.

CpG is a shorthand , cytosin and guanine separated by only one phosphate : phosphate links any two nucleosides together in DNA.

It is not trancriptionally repressed genomic region.