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Structure of nucleosome and extent of chromatin condensation in metaphase chromosome?
Wiki User
∙ 14y ago
nucleosomes are DNA bound by histone.....
Wiki User
∙ 14y ago
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What is the description of a chromatin fiber?
A chromatin fiber is the point at which DNA in chromatin is higher then the nucleosome. Chromatin fibers occur when the linear array of the nucleosome fold into a tighter fiber.
What structure will the chromatin become in mitosis?
The chromatin in the cell becomes chromosomes in prophase, the first stage of mitosis. The chromatin coils tightly together to form into separate chromosome strands during this phase.
What is a chromosome made up of when it coils?
Chromatin
What is sister chromatin?
A sister chromatin is one half of a chromosome. Two sister chromatids come together connected by a centromere to create one chromosome.
What is a nucleosome and what organic component is it primarily composed of?
Chromatin composed of tetramer of histones 2 copies each of Histone H2A, H2B, H3 and H4. DNA is bound on the nucleosome and uses 147 basepairs of DNA.
What is the fundamental repeating unit of organization in a eukaryotic chromosome?
The nucleosome is the basic unit that organizes the structure of an eukaryotic chromosome. The nucleosome is DNA wrapped around histone proteins which allows the DNA to condense into chromosomes.
Which of the following represents the order of increasingly higher levels of organization of chromatin?
The order of increasingly higher levels of organization of chromatin is nucleosome, solenoid fiber, looped domain, and chromosome.
What is the description of a chromatin fiber?
A chromatin fiber is the point at which DNA in chromatin is higher then the nucleosome. Chromatin fibers occur when the linear array of the nucleosome fold into a tighter fiber.
What structure will the chromatin become in mitosis?
The chromatin in the cell becomes chromosomes in prophase, the first stage of mitosis. The chromatin coils tightly together to form into separate chromosome strands during this phase.
What is the highest level of chromatin organisation?
nucleosome, 30-nm chromatin fiber, looped domainLook at the effect the earth's Schumann Resonance on human DNA.Also, how the Earth's resonance in increasing.
What are three levels of structure in the DNA packaging system found within a eukaryotic nucleus?
Packing ratio - the length of DNA divided by the length into which it is packagedFor example, the shortest human chromosome contains 4.6 x 107 bp of DNA (about 10 times the genome size of E. coli). This is equivalent to 14,000 µm of extended DNA. In its most condensed state during mitosis, the chromosome is about 2 µm long. This gives a packing ratio of 7000 (14,000/2).To achieve the overall packing ratio, DNA is not packaged directly into final structure of chromatin. Instead, it contains several hierarchies of organization. The first level of packing is achieved by the winding of DNA around a protein core to produce a "bead-like" structure called a nucleosome. This gives a packing ratio of about 6. This structure is invariant in both the euchromatin and heterochromatin of all chromosomes. The second level of packing is the coiling of beads in a helical structure called the 30 nm fiber that is found in both interphase chromatin and mitotic chromosomes. This structure increases the packing ratio to about 40. The final packaging occurs when the fiber is organized in loops, scaffolds and domains that give a final packing ratio of about 1000 in interphase chromosomes and about 10,000 in mitotic chromosomes.Eukaryotic chromosomes consist of a DNA-protein complex that is organized in a compact manner which permits the large amount of DNA to be stored in the nucleus of the cell. The subunit designation of the chromosome is chromatin. The fundamental unit of chromatin is the nucleosome.Chromatin - the unit of analysis of the chromosome; chromatin reflects the general structure of the chromosome but is not unique to any particular chromosomeNucleosome - simplest packaging structure of DNA that is found in all eukaryotic chromosomes; DNA is wrapped around an octamer of small basic proteins called histones; 146 bp is wrapped around the core and the remaining bases link to the next nucleosome; this structure causes negative supercoiling
What is the difference between cromatin reticulam and cromosome?
Chromatin refers to the combination of DNA and proteins that make up the genetic material in the cell nucleus. It is a loosely organized structure. Chromosome, on the other hand, is a condensed and tightly coiled structure formed by the packaging of chromatin during cell division. Chromosomes are visible under a microscope and are essential for cell division and the transmission of genetic information.
Doubled rod of condensed chromatin?
the chromosome
When the DNA in a cell is uncoiled and spread throughout the nucleus it is called?
The most tightly-coiled form of DNA is a chromosome.
What prophase associated with nuclear energy?
This is nothing to do with nuclear energy: see WikipediaProphase is a stage of mitosis in which the chromatin condenses into a highly ordered structure called a chromosome (it is at this stage giemsa staining can be applied to elicit G-banding in chromosomes) in which the chromatin becomes visible. This process, called chromatin condensation, is mediated by the condensin complex. Since the genetic material has been duplicated in an earlier phase of the cell cycle, there are two identical copies of each chromosome in the cell. Identical chromosomes, called sister chromatids, are attached to each other at a DNA element present on every chromosome called the centromere.
What is a pair of chromatin called?
Chromosome
What is cetromere?
The center of the chromatin or chromosome.
