BIO 101 Lecture Notes - Lecture 4: Cell Membrane, Prokaryote, Cell Theory
Document Summary
Developed based on the work of several biologists (schleiden, schwann, virchow) All living things are composed of one or more cells. Cells are organisms" basic units of structure and function. What time of microscope do we use to study cells: compound light microscope, electron microscopes (illuminate the specimen and produce magnified image. 2 major types of cells: prokaryotic cell, key features. Domain bacteria and archaea: eukaryotic cell, key features. May or may not have a cell wall. Structure and function of organelles: plasma membrane - regulates what enters and exits a cell. Boundary between the cell and the external environment: phospholipids bilayer, membranes contain proteins that have important functions, all cells are surrounded by plasma membrane. Organelles communication: nucleus- storage center of cells dna manages cell functions, ribosomes- site of protein synthesis, two subunits, location in cell: attached to endoplasmic reticulum (er) or free in cytoplasm, use messenger rna (mrna) as a template.
