2006-06-20 03:55:00 · 3 answers · asked by Aroura 3 in Science & Mathematics ➔ Biology
a premature chromosome, with only half of the nitrogen bases that it needs.
2006-06-20 03:59:13 · answer #1 · answered by brainlessbandit 5 · 0⤊ 3⤋
Hello there!
:)
In 1882 Walther Flemming used the term Chromatin for the first time. Flemming assumed that within the nucleus there was some kind of a nuclear-scaffold. Further there were nucleoli, the nuclear plasm and the nuclear membranes.
Chromatin is the DNA/Protein material which makes up the chromosomes, its modification plays a significant role in the regulation of gene expression.
Chromatin is the structural building block of a chromosome. It is found inside the nucleus of a cell and consists of a complex of DNA and protein in eukaryotic cells. The nucleic acids are generally in the form of double-stranded DNA (a double helix). The major proteins involved in chromatin are histone proteins, but other chromosomal proteins are prominent too. DNA is packaged into chromatin thereby constraining the size of the molecule and allowing the cell to control expression of the chromatin-packaged genes. Changes in chromatin structure are affected mainly by methylation (DNA and proteins) and acetylation (proteins). Chromatin structure is also relevant to DNA replication and DNA repair.
Chromatin can be made visible by staining, hence its name, which literally means coloured material.
There are two types of chromatin: euchromatin and heterochromatin.
*A common mistake, people often get confused with chromatin and chromatids, so here is their differences!
A chromatid forms one part of a chromosome after it has coalesced for the process of mitosis or meiosis. During either process, the word "chromosome" indicates a pair of two exactly identical ("sister") chromatids joined at the central point of each chromatid, called the centromere.
A chromosome, by definition, has exactly one centromere. Thus when sister chromatids are pulled apart by the mitotic spindle during anaphase -- that is, when the centromere joining two sister chromatids splits into two centromeres -- then each sister chromatid becomes an independent chromosome.
it's very much in detail, hopfully u don't have to know it all. :P
i hope i've helped you!
:) Good luck
2006-06-20 05:07:06 · answer #2 · answered by Doctor Wouth 1 · 4⤊ 3⤋
What Is Chromatin
2016-10-04 01:35:39 · answer #3 · answered by ? 4 · 0⤊ 0⤋
Chromatin is the structural building block of a chromosome. It is found inside the nucleus of a cell and consists of a complex of DNA and protein in eukaryotic cells. The nucleic acids are generally in the form of double-stranded DNA (a double helix). The major proteins involved in chromatin are histone proteins, but other chromosomal proteins are prominent too. DNA is packaged into chromatin thereby constraining the size of the molecule and allowing the cell to control expression of the chromatin-packaged genes. Changes in chromatin structure are affected mainly by methylation (DNA and proteins) and acetylation (proteins). Chromatin structure is also relevant to DNA replication and DNA repair.
2006-06-20 04:30:27 · answer #4 · answered by crunch2175 1 · 1⤊ 0⤋
Chromatin is the structural building block of a chromosome. It is found inside the nucleus of a cell and consists of a complex of DNA and protein in eukaryotic cells.
2006-06-20 04:03:29 · answer #5 · answered by David K 3 · 2⤊ 0⤋
Chromatin is what we call dna when it has not condenced into viewable chromasomes (which it does just before cell division). Chromatin is just a jumbles mess of fiber like material.
2006-06-20 04:04:42 · answer #6 · answered by squeakyLOL 2 · 0⤊ 0⤋
Chromatin is the uncondensed form of chromosomes. Stains lightly, and not very visible under microscope :D
2006-06-20 05:16:03 · answer #7 · answered by Anonymous · 2⤊ 0⤋
A chromatin is the fibre-shaped form in which nuclear dna exists when the a cell is not dividing.
2006-06-20 04:01:24 · answer #8 · answered by Sabrina W 1 · 1⤊ 0⤋
structural building block of a chromosome...found inside the nucleus, and is composed of dna and proteins
2006-06-20 04:00:15 · answer #9 · answered by coot 1 · 0⤊ 0⤋
chromatin:-
the material of which the chromosomes of organisms other than bacteria (i.e. eukaryotes) are composed, consisting of protein, RNA, and DNA.
2013-12-09 05:35:56 · answer #10 · answered by Beena rai 1 · 0⤊ 0⤋
It's a super-strong light-weight alloy of chrome and tin most likely to be utilized in rail guns.
2006-06-20 04:52:40 · answer #11 · answered by Anonymous · 0⤊ 3⤋