Answer:
E) Improve membrane fluidity
Explanation:
Cholesterol constitutes the basic structural element of the skeleton of cell membranes. Without their reinforcement, the membranes would become extremely fluid and lose their consistency. Cholesterol is found in the esterified membranes in its hydroxyl group (OH): with fatty acids, mainly oleic and linoleic, or as cholesterol sulfate. The cholesterol-sulfate polar group is disposed on one of the faces of the membrane that interacts with other polar groups in that area, while its bulky hydrophobic portion is embedded between the apolar parts of the lipids that form the membrane skeleton and They fulfill many other functions, among which the reduction in the permeability of protons and sodium ions, and their participation in signal transmission. Cholesterol is also essential in phagocytosis processes carried out by cells to capture many nutrients and, in general, for the function of cleaning up organic waste produced by macrophages.
The membranes must have a fluid structure so that the integrated proteins can move "horizontally" to interact with their ligands and with other proteins. The fluidity is given by unsaturated fat. With the excess of saturated fat, the membranes become rigid, but only with the necessary unsaturated fat the membranes are extremely fluid and very sensitive to temperature changes. Cholesterol stabilizes the structure of the membranes; In order for them to have the correct structure, they must have the correct proportions of saturated, unsaturated fats and cholesterol. The membranes produced in the laboratory without cholesterol are unstable to temperature changes, drastically modifying their fluidity against the small temperature changes that occur in the physiological range.
In addition to its functions in cell membranes, cholesterol is an important product that metabolism uses as a raw material to make other compounds:
*Bile salts
*Sex hormones
*Hormones of the adrenal cortex (corticosteroids)
*Vitamin D (Calciferol)
Answer:
There is alternate splicing of the runner mRNA.
I think it’s competition, since they both need to compete to get the nectar.
It is a spreadable disease and highly contagious, and communicate very rapidly, so when it first appeared, it was a very difficult task to prevent ourselves from that Hazardous condition. The Scientific name of this bacteria is "MyoBacterium Tuberculae", As it is directly spreads through air means, air is the vector as there's not any insect or external agent for that Job. Could be life threating if proper treatment is unavailable for a Patient. It exerts dangerous symptoms like: "Chills, fatigue, fever, loss of appetite, malaise, night sweats, or sweating". It can be diagnosed through the process of "<span>The Mantoux </span>tuberculin skin test (TST) or the TB blood test" It is performed by injecting a small amount of fluid called tuberculin into the skin in the lower part of the arm. Doctors may prescribe certain Antibiotics to the patient if he's been diagnosed like Isoniazid, Rifampicin, Pyrazinamide, Ethambutol and <span>Streptomycin. By proper care, we can get our control over the disease.
Hope this helps!</span>
That they are both theories of evolutionary change, but the tempo of the change is different enough that we have the two theories. Rapid evolutionary change punctuated with long periods of stasis describes the former while gradual and incremental change over long periods is the description of the later. Natural selection seems to be more important in gradualism than punctuation, but this is <span>a murky area that is argued about often.</span>
