In Class: Virus! video (National Geographic; LRC) - you will be expected to take notes during the video
(these are not on the web page)

I.  Important Viral Facts
    A.  Virion -virus particle
        1. Nucleic Acid - DNA or RNA
        2. Capsid - protein coat (protective)
        3. Shapes and types
    B. Viruses can only grow within living cells.
    C. Differences between viruses and cells

II.  Bacteriophage (Bacterial viruses)
    A. Structure
        1.  Head - capsid and nucleic acid
        2.  Tail - protein
        3.  Tail plate
        4.  Tail fibers - important for recognition and attachment to bacterial cell.
    B. Life cycles Lysogeny or Lytic
        Lytic life cycle of T4 phage:
        1.  Attachment of virus to bacterial cell.
        2.  Penetration and injection of phage DNA into cell.
        3.  Phage mRNA is synthesized inside cell using cell enzymes and phage proteins are manufactured; phage DNA is also synthesized.
        4.  Mature phage particles are assembled.
        5. Bacterial cell lyses and mature, infectious virions are released.