GSU BIOL 3800 - Final Exam Study Guide (4 pages)

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Final Exam Study Guide

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Final Exam Study Guide


Study Guide
Georgia State University
Biol 3800 - Molecular Cell Biology
Molecular Cell Biology Documents

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Biol 3800 1st Edition Exam 4 Study Guide Review these important notes and key terms for test Chapter 15 Cell Communication Cells communicate with each other using signals Signaling molecules illicit a specific response only in target cells that have a receptor for that signal Signals that cannot get through the cell membrane will bind to cell surface receptors Cell Surface Receptors Integral Membrane proteins 3 distinct domains Exoplasmic Cytoplasmic Membrane spanning The cell surface receptor is a trans membrane protein Signal Ligand Signal Transduction converting an extracellular signal to an intracellular response Paracrine Signaling molecules released by a cell affect target cells in close proximity Neurotransmitters Growth factors regulate development Signals and Receptors Different cell types may have different sets of receptors for the same ligand Each receptor can induce a different response Different cell types may have the same receptor Binding of a particular ligand to a particular receptor may trigger a different response in each type of cell One ligand can induce different cells to respond in different ways Receptor Ligand Complex Measure of the affinity of the receptor for its ligand Kd dissociation constant Maximum cellular response does not require the activation of all receptors Sensitivity of the cell to the signal depends on the number of receptors Chapter 20 Cell Cycle The Cell Cycle Two main molecular processes take place during the cell cycle S phase Chromosome duplication M phase Chromosomes are distributed to each daughter cell Cell division is controlled by checkpoints that are in place to prevent initiation of a step before the previous step is complete Cell Cycle Phases G1 Gap Between the end of mitosis and DNA synthesis for next mitosis Most of the life of a typical cell S Synthesis DNA replication chromosomes copied G2 Gap Between synthesis and mitosis preparing for cell division M Mitosis Chromosomes condense spindles form nuclear

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