Which region of chromatin is transcriptionally silent?

The two types of chromatin, heterochromatin and euchromatin, are functionally and structurally distinct regions of the genome. Heterochromatin is densely packed and inaccessible to transcription factors so it is rendered transcriptionally silent (Richards and Elgin 2002).

Which region of chromatin is transcriptionally silent * 1 point?

Euchromatin is the transcriptionally active regions of the genes. These are lightly stained region. Euchromatin is loosely stained structure which normally converts into m-RNA and helps in transcription of proteins.

What is transcriptionally silent chromatin?

Gene Ontology Term: transcriptionally silent chromatin

The ordered and organized complex of DNA and protein that forms regions of the chromosome that are not being actively transcribed. Synonyms transcriptionally inactive chromatin View GO Annotations in other species in AmiGO.

What are heterochromatin regions?

Heterochromatin, originally identified via cytological studies using the polytene chromosome, is defined as chromatin regions that maintain a dense staining and condensation pattern throughout the cell cycle [61,64].

What are the 2 types of chromatin?

Chromatin exists in two forms. One form, called euchromatin, is less condensed and can be transcribed. The second form, called heterochromatin, is highly condensed and is typically not transcribed. Under the microscope in its extended form, chromatin looks like beads on a string.

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What is the difference between chromatin and chromatid?

As mentioned above, chromatin is composed of DNA and histones that are packaged into thin, stringy fibers. The chromatin undergoes further condensation to form the chromosome. … A chromatid is either of the two strands of a replicated chromosome. Chromatids connected by a centromere are called sister chromatids.

What happens when cytosine is methylated?

Cytosine methylation is a common form of post-replicative DNA modification seen in both bacteria and eukaryotes. Modified cytosines have long been known to act as hotspots for mutations due to the high rate of spontaneous deamination of this base to thymine, resulting in a G/T mismatch.

Which is transcriptionally active?

Transcriptionally active or potentially active genes can be distinguished by several criteria from inactive sequences. … We speculate that the binding of such proteins may switch on a change in the conformation and/or the protein composition of a chromatin segment or domain containing one to several genes.

What is the meaning of transcriptionally?

(trăn-skrĭp′shən) The process in a cell by which genetic material is copied from a strand of DNA to a complementary strand of RNA (called messenger RNA). Transcription takes place in the nucleus before messenger RNA is transported to the ribosomes, the places in the cell where proteins are made.

Why is euchromatin called transcriptionally active chromatin?

“Assertion :- Euchromatin is said to be transcriptionally acitve chromatin. Reason : Due to loose coilling of enchromatin RNA polymerase can easily move up on it.”

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