Is heterochromatin or euchromatin more condensed?
Heterochromatin is more condensed than euchromatin. Typically, the more condensed chromatin is, the less accessible it is by transcription factors and polymerases. The dynamic nature of chromatin is regulated by enzymes.
Is heterochromatin highly condensed?
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.
What is the difference between heterochromatin and euchromatin in terms of nuclease sensitivity?
What is the difference between heterochromatin and euchromatin in terms of Gene expression? Heterochromatin is less accessible to DNA regulatory proteins and therefore shows little to no gene expression. Heterochromatin is located at the nuclear periphery while euchromatin is located more.
Is euchromatin is partially condensed?
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 heterochromatin is folded with the histone proteins.
What is the purpose 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.
Is euchromatin lightly stained?
Appearance. In general, euchromatin appears as light-colored bands when stained in G banding and observed under an optical microscope, in contrast to heterochromatin, which stains darkly. This lighter staining is due to the less compact structure of euchromatin.
Why is heterochromatin highly condensed?
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.
How does euchromatin differ from heterochromatin in structure and function?
In heterochromatin, the DNA is tightly bound or condensed. In euchromatin, the DNA is lightly bound or compressed. The DNA in heterochromatin is folded with the histone proteins. The DNA in euchromatin is unfolded to form a beaded structure.