Difference Between Euchromatin and Heterochromatin

Euchromatin is lightly stained under nuclear stains. In heterochromatin, the DNA is tightly bound or condensed. In euchromatin, the DNA is lightly bound or compressed. ... The DNA in euchromatin is unfolded to form a beaded structure.

1. How does euchromatin differ from heterochromatin quizlet?
2. Why is heterochromatin inactive?
3. What is the function of euchromatin?
4. What are the two types of heterochromatin?
5. What is meant by heterochromatin?
6. Where is euchromatin found?
7. What is true heterochromatin?
8. Can heterochromatin become euchromatin?
9. What is the difference between constitutive and facultative heterochromatin?

How does euchromatin differ from heterochromatin quizlet?

What is the difference between euchromatin and heterochromatin? Euchromatin has regular cycles of condensation and decondensation between interphase and mitosis, whereas heterochromatin remains highly condensed throughout cycle (except for at replication).

Why is heterochromatin inactive?

The Formation of Heterochromatin and RNA interference. Transcriptionally inactive heterochromatin is vital to sustaining stable chromosome structure throughout the cell cycle. ... Heterochromatin is densely packed and inaccessible to transcription factors so it is rendered transcriptionally silent (Richards and Elgin 2002) ...

What is the function of euchromatin?

Function. Euchromatin participates in the active transcription of DNA to mRNA products. The unfolded structure allows gene regulatory proteins and RNA polymerase complexes to bind to the DNA sequence, which can then initiate the transcription process.

What are the two types of heterochromatin?

There are two types of heterochromatin, constitutive HC and facultative HC, which differ slightly, depending on the DNA that they contain. The richness in satellite DNA determines the permanent or reversible nature of the heterochromatin, its polymorphism and its staining properties.

What is meant by heterochromatin?

Heterochromatin is a tightly packed form of DNA or condensed DNA, which comes in multiple varieties. ... Facultative heterochromatin is the result of genes that are silenced through a mechanism such as histone deacetylation or Piwi-interacting RNA (piRNA) through RNAi.

Where is euchromatin found?

Euchromatin exists in decondensed form and is found in the distal arms of the chromosome. It is usually dispersed all around the nucleus and is replicated throughout the S phase. Euchromatin is the transcriptionally active form of chromatin.

What is true heterochromatin?

Heterochromatin is a form of chromatin that is densely packed—as opposed to euchromatin, which is lightly packed—and is found in the nucleus of eukaryotic cells. There are two main types of heterochromatin: constructive heterochromatin and facultative heterochromatin. ...

Can heterochromatin become euchromatin?

Yes absolutely. The changing in expression based on density of segments of chromosomes is the basis for the field of epigenetics. ... Histone acetylation- can cause segments of DNA to become less densely packed and upregulate expression, which is an example of heterochromatin changing to euchromatin.

What is the difference between constitutive and facultative heterochromatin?

The main difference between constitutive and facultative heterochromatin is that constitutive heterochromatin is a permanent factor in a particular cell type, whereas facultative heterochromatin is not a permanent character of each cell of particular cell type.