Question

What is chromatin fibre?

Answer 1

Answer:

hope it helps^_^

plz mark me brainliest

Explanation:

Chromatin is a complex of DNA and protein found in eukaryotic cells. Its primary function is packaging very long DNA molecules into a more compact, denser shape, which prevents the strands from becoming tangled and plays important roles in reinforcing the DNA during cell division, preventing DNA damage, and regulating gene expression and DNA replication. During mitosis and meiosis, chromatin facilitates proper segregation of the chromosomes in anaphase; the characteristic shapes of chromosomes visible during this stage are the result of DNA being coiled into highly condensed networks of chromatin.

The primary protein components of chromatin are histones, which bind to DNA and function as "anchors" around which the strands are wound. In general, there are three levels of chromatin organization:

DNA wraps around histone proteins, forming nucleosomes and the so-called "beads on a string" structure (euchromatin).

Multiple histones wrap into a 30-nanometer fibre consisting of nucleosome arrays in their most compact form (heterochromatin).

Higher-level DNA supercoiling of the 30-nm fiber produces the metaphase chromosome (during mitosis and meiosis).

Answer 2

Answer:

$\underline{\huge{Question:-}}$

What is chromatin fibre?

$\underline{\huge{Answer:-}}$

Chromatin : (Gk. chroma - colour) The interphase nucleus contains a loose, extended and diffused network of nucleoprotein fibres called chromatin. These are named so because of their ability to get stained with certain basic dyes. Chromatin fibres condense to form chromosomes.

$\underline{\huge{More\ To\ Know:-}}$

• Chromatin is essentially composed of DNA and basic proteins called histones. It also contains RNA and some non-histone proteins. The histone proteins are the packaging proteins that are associated with packaging of DNA into compact structures called chromosomes.
• In higher organisms, the well-organised nucleus contains a definite number of chromosomes of definite size and shape. For example, a single human cell has approximately two metre long thread of DNA distributed among its forty six chromosomes (23 pairs of chromosomes)