You asked: How many chromatin Fibres are there in a cell?

If there are 46 chromosomes in a cell there will be 46 chromatin fibres inside the nucleus during interphase.

How many chromatin Fibres are in a cell?

These are positively-charged proteins that strongly adhere to negatively-charged DNA and form complexes called nucleosomes. Each nuclesome is composed of DNA wound 1.65 times around eight histone proteins. Nucleosomes fold up to form a 30-nanometer chromatin fiber, which forms loops averaging 300 nanometers in length.

Is the 30 nm fiber chromatin?

The structure of the 30-nm fibre is a key element in understanding chromatin compaction. It consists of a helical array of nucleosomes, each comprising a core particle wrapping ∼146 or 147 base pairs (bp) of DNA associated with a linker histone.

Where are chromatin Fibres present in a cell?

Chromatin is a complex of macromolecules composed of DNA, RNA, and protein, which is found inside the nucleus of eukaryotic cells. Chromatin exists in two forms: heterochromatin (condensed) and euchromatin (extended).

What is the difference between chromatin Fibre and chromosomes?

The chromatin further condenses to form chromosomes.

Difference between Chromosomes and Chromatin
Composed of nucleosomes They are condensed chromatin fibers
Unpaired Paired
Visualized under electron microscope Visualised under light microscope
Thin, long, uncoiled structure Thick, compact, ribbon-like structure

Does chromatin have RNA?

Whether RNA itself plays a direct structural role in chromatin is, however, not known. Here, we report results indicating that RNA plays a general structural role in eukaryotic chromatin. Our results indicate that purified chromatin contains significant amounts of RNA (2%–5% of total nucleic acids).

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Why is chromatin only found in eukaryotes?

Chromatin is only found in eukaryotic cells, with prokaryotic cells having a different arrangement of their genetic material called a genophore – a chromosome that doesn’t contain chromatin.

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