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What are loosely coiled fibers containing protein and DNA within nucleus?
Wiki User
∙ 13y ago
Chromatin is the generic term for DNA (not "fiber") wound around proteins called histones. From the description you've given, it sounds like you're talking about euchromatin.
There are generally two types of chromatin: euchromatinand heterochromatin. Under the microscope, heterochromatin tends to stay at the periphery of the nucleus, while euchromatin tends to stay central in the nucleus. Also microscopically, euchromatin is a bit lighter (ie, it doesn't stain as heavily) than heterochromatin, reflecting the fact that euchromatin is less dense than heterochromatin. The decreased density has to do with euchromatin being loosely wound around histones, whereas heterochromatin is wound rather tightly. Heterochromatin also has a number of other chromatin-modifying proteins around that prevent it from coming undone easily.
The functional difference between the two types of chromatin has to do with how effectively DNA transcription (the process by which DNA is transcribed to RNA) can occur. The dense heterochromatin is so tightly wound and so tightly packed with associated proteins that the DNA transcription machinery can't get access to the DNA contained within the heterochromatin. Only the loosely wound euchromatin will permit the machinery to gain access to its DNA. Therefore, generally euchromatin contains DNA that is being actively transcribed, while heterochromatin is transcriptionally silent.
THE ANSWER IS CHROMATIN!!
Wiki User
∙ 14y ago
Wiki User
∙ 13y agoChromosomes or chromatids.
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Loosely coiled fiber containing DNA and protein with in nucleus?
Chromatin
What is the loosely coiled threadlike material in the nucleus?
euglena
What is loosely coiled DNA?
chromatin
What molecule is a chromosome made of?
protein and DNA Each chromosome in the nucleus includes one macromolecule of DNA, folded and coiled with protein molecules to reduce its size.
A complex of proteins and DNA strands that are loosely coiled such that translation and transcription can occur?
diarrhea
What are coiled protein strands that have barbs tipped with poison?
A nematocyst is a coiled protein strands that have barbs tipped with poison. It is a capsule within a specialized cells.
What is formed with coiled up DNA?
Coiled up DNA, combined with protein histone, forms chromosomes.
Coiled threads containing the genetic code are found in?
Chromatin
Where are the chromosomes in the nucleus?
They are inside nucleus.They are coiled only when dividing.
What is the spiral shape of a coiled protein called?
Helix
What is chromatin in your body?
chromatin is coiled threads containing the genetic code
Why is the DNA in the nucleus loose and not well defined into chromosomes?
In the interphase nucleus the chromatin exists in two forms; loosely coiled form called euchromatin and tightly coiled form called heterochromatin. These two types become much more coiled to form the chromosome at the time of cell division. Now come to the point. When DNA is a bit loosely colied, that is, in the euchromatin, its bases are available for transcription. On the other hand, when it is in the form of heterochromatin, the bases are not accessible for reading by RNA polymerase, hence transcription is not possible. As majority of genes must be transcribed in the nucleus, so the chromosomes must be decondensed to appear in the form of chromatin, and that too in the form of euchromatin. If the DNA remained organized in the form of chromosomes, genes would remain inactive in the sense that they would not be acessible for transcription.
