Anyone can get melasma, but it is more common among young women. Melasma often appears during pregnancy, in the second or third trimesters. Doctors don't know exactly what causes melasma, but the condition is associated with the female hormones estrogen and progesterone.
A ribosome is made of numerous proteins and RNA. Function The Golgi complex takes proteins made by the endoplasmic reticulum and exports them out of the cell as needed. It is able to keep dangerous proteins from damaging the cell which made them. It is like a packaging department ready to deliver the protein products made in the cell.
DNA does not manufacture specific proteins. It codes for many different proteins that depend upon the cell's function. Liver cells' DNA manufactures different proteins that ma â¦ tch the function of the liver. Kidney cells' DNA manufactures different proteins that match the function of the kidneys.