BIOA01H3 Chapter Notes - Chapter 2: Nucleolus, Nuclear Lamina, Ribosomal Rna
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BIOA01H3 Full Course Notes
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Endomembrane system: a collection interrelated internal membranes nuclear envelope, endoplasmic reticulum, Figure 1 diagram of an animal cell, highlighting the major organelles and their primary locations. Rna molecules with the cytoplasm: nucleoplasm is the semi-liquid substance inside the nucleus, nucleoli (or nucleolus) is the site of rrna synthesis. Ribosomes: protein factories: although similar, eukaryotic ribosome is different from bacterial and archaeal ribosomes, two types of ribosomes, free ribosomes are freely suspended in cytosol. Pass into the nucleus (becomes part of chromatin, line the nuclear envelope or remain in the nucleoplasm) Become parts of mitochondria, chloroplasts and the cytoskeleton: ribosomes bound to er. In the liver, smooth er membranes contains enzymes that convert drugs, poisons and toxic byproducts of cellular into substances that can easily be removed: stores calcium ions. In this process the plasma membrane forms a pocket, which bulges inward and pinches off into the cytoplasm as an endocytic vesicle.