i. The most important organelle in the cell is nucleus.
ii. It is surrounded by two membranes. Membrane has many opening called nuclear pore.
iii. Nucleus is the control center of the cell. The nucleus also contains genetic material or DNA (Deoxyribonucleic acid). DNA stores all the genetic information needs for making proteins and many other important molecules.
iv. Through nuclear pore, transport of materials into and out of the nucleus. Within the nucleus of a cell a round structure called the nucleolus.
v. Outside of the nucleus but within the cell membrane is a gel-like substance called cytoplasm is present. In the cytoplasm other cell organelles are present.
vi. Making proteins is a very essential function of a cell.
vii. Ribosomes are small cell organelles which synthesize protein.
viii. Once proteins are made, they need to be moved to different parts of the cell.
ix. The endoplasmic reticulum (E.R.) is a collection of lipid membranes that work to move the proteins from one area of the cell to another.
x. The E.R. transports these proteins to another organelle that will package them up and ship them out.
xi. The smooth E.R. does not have any ribosomes on its surface.
xii. This is where the lipid part of the cell membrane is assembled. The newly formed protein is need to be packaged in such a way that they can leave the cell and be taken in by the parts of the body that need them.
xiii. The organelle responsible for this is called the Golgi complex or Golgi bodies.
xiv. The Golgi complex changes, sorts and packages the proteins as they leave the E.R. so they are ready to leave the cell. Because it is so important to shipping things out of the cell, the Golgi apparatus is always found near the cell membrane.
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