Higher-order folding involves association of the DNA with a nuclear scaffold, which contains large amounts of Histone H1 and Topoisomerase II.
<h3>What is Histone?</h3>
Histones are highly basic proteins abundant in lysine and arginine residues that provides structural support for a chromosome. They are found in eukaryotic cell nuclei. They act as spools around which DNA winds, which gives the chromosome a more compact shape, to create structural units called nucleosomes. Nucleosomes in turn are wrapped as 30-nanometer fibers that form tightly packed chromatin. There are five types of histones namely H2A, H2B, H3, H4 and H1 linker histone. Within a nucleosome, they exist as two dimers of (H2A-H2B) and a complex of (H32-H42) eventually forming an octamer.
<h3>What is Topoisomerases?</h3>
Topoisomerases are nuclear enzymes which play essential roles in DNA replication, transcription, chromosome segregation, and recombination.
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Yes. The darker pigmentation of their skin helps them survive in the sun. Therefore they will thrive more so then someone with fair skin. Darker and lighter pigment in skin, is an adaptation humans went through based mostly on the amount of sun. If you lived in the heat with a lot of sun exposure ex: Africa, you would need to have darker skin to keep from being sun burnt as badly. Someone far from the equator with less sun or: Russia, wouldn’t need as much pigmentation in their skin for this reason. Heat also plays a role in it I believe.
Answer:
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In situations where people have done studies prior to releasing non-native species, there have been problems because of the lack of predators in the new environment.
<u>Explanation:</u>
When a non - native species is put in a new environment, the major problem is adaptation, not every species is adaptable, and non - native species lack to survive in new environment.
In situations where people have done studies prior to releasing non-native species, there have been problems because of the lack of predators in the new environment.
These non - native species are known as invasive species, they can cause disruption of trees and the animals with their invasion.
They are capable of destroying the cycle of the environment and also affect the human beings. They can damage the economic cost, however their survival is a big question as it lacks predators and adaptation
Answer:
Secretion of the neurotransmitter serotonin, which is a water-soluble amine molecule
Explanation:
Exocytosis is defined as the process where cell transports secretary products which are packaged in transport vesicles such as antibodies, peptide hormones, secretory proteins, and enzymes with the help of cytoplasm to the plasma membrane.
Some example of exocytosis are:
1) Neurotransmitters secrets from nerve cells.
2) Antigens which helps to stimulate the immune response.
3) Proteins of the plasma membrane.
