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VIRUSES (capsids and envelopes (rod-shaped (tobacco mosaic virus),…

- - - - replicative cycle
        
        glycoproteins on the viral envelope bind to specific receptor molecules on the host cell promoting viral uptake by the cell
        
        the capsid and viral genome enter the cell
        
        the viral genome functions as a temperate for synthesis complementary RNA strands by a viral RNA polymerase
        
        new copies of viral genome RNA are made
        
        RNA strands also functions as mRNA which is transferred into both capsids proteins
        
        vesicles transport envelope glycoproteins to plasma membrane
        
        a capsid assembles around each viral genome molecule
        
        each new virus buds from the cell
- - - - "lock and key" identifying host cells by surface proteins and specific receptor molecules on the outside of the the cells
- - - - attachment
      - entry of phage DNA and deviation of cell DNA
      - synthesis of viral genomes and proteins
      - self assembly
      - release
  - - - a virus can shift and do both a lytic and lysogenic cycle
        
        restriction enzymes (restrict a phages ability to replicate within the bacterium)
- - - - transcribes an RNA template into DNA, an RNA -->DNA information
        
        opposite of usual direction
        
        example AIDS