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.
Without the ribosomes the message would not be read and proteins could not be produced. Ribosomes are the tiny organelles inside cells which are responsible for protein synthesis. Which means it creates the protein in the cell. Ribosomes are part of the cellular machinery that are involved in production of proteins.