ribosomes and Endoplasmic Reticulum (ER).txt
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which type of cells has a system of internal membranes that play an essential role in processing proteins?
eukaryotic cells NOT prokaryotic cells
What are ribosomes made up of?
dozens of different proteins as well as RNA
Endoplasmic reticulum (ER)
extensive system of internal membranes that moves proteins and other substances thru the cell
What are the Endoplasmic Reticulum (ER) membrane made up of?
lipid bilayer with embedded proteins
small, membrane-bound sac that transports substances in cells
What is smooth ER?
looks smooth when viewed from an electron microscope because it LACKS ribosomes
What is rough ER?
looks rough when viewed from an electron microscope because it HAS ribosomes
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