The cell membrane is a lipid bilayer that prevents that passage of water and ions. This allows cells to maintain a higher concentration of sodium ions out the outside of the cell. Cells also maintain a higher concentration of potassium ions and organic acids on their inside.
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<span>Adenintriphosphate, also known as ATP, is the main energy carrier of the cell. This occurs because it is a molecule responsible for providing the energy for DNA synthesis; in fact, most metabolic reactions that require energy are associated with ATP and that energy is produced there.</span>
The most well known disease caused by bacilli is anthrax, caused by Bacillus anthracis. Anthrax has a long history with humans.
...........The answer is A
They are proteins inside the cell
