Different types of peanuts. Not every peanut is the same! There are thousands of different types of peanuts, these are known as different cultivars. We can distinguish four popular different types of peanuts: the Runner peanut, the Virginia peanut, the Valencia peanut and the Spanish peanut. All these peanuts differ in size, color, flavor and oil content and are often used for very different purposes.
For a signal molecule to bind with an intracellular receptor it must be able to pass through the cellular membrane. Generally signal molecules that enter the cell are nonpolar and fat soluble. These signal molecules can pass through the lipid bilayer of the cell membrane.
cell. How can a cell make sense of all these signals? Cells have receptors. A receptor is a protein that detects a signal and acts because of it. Only certain molecules will bind to a receptor. A cell responds to a signal only if it has a receptor for that signal. When a receptor binds to a signal, it changes shape. As a result,