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Biology - Coggle Diagram

- - - - May consist of double-stranded DNA, single-stranded DNA, double-stranded RNA, or single-stranded RNA, depending on the virus
      - Viruses can be an DNA virus or RNA virus
      - Capsid
        
        The protein shell enclosing the viral genome
        
        The capsid may be rod-shaped, polyhedral, or more complex in shape.
      - Viral Envelope
        
        A membrane, derived from membranes of the host cell, that cloaks the capsid, which in turn encloses a viral genome.
    - - A virus that infects bacteria; also called a phage.
- - - - Cocci, can be found as a single, chains, or clusters.
    - - Bacilli, can be found in single or in chains
    - - Spirochetes that can be corkscrew-shaped, comma, or loose coil.
  - - - A type of polymer in bacterial cell walls consisting of modified sugars cross-linked by short polypeptides.
      - Gram Stain
        
        A staining method that distinguishes between two different kinds of bacterial cell walls
        
        Can be used to help determine medical treatment for an infection.
        
        Gram-Negative
        
        A group of bacteria that have a cell wall that is structurally more complex and contains less peptidoglycan.
        
        Often more toxic than gram-positive bacteria.
        
        Gram-Positive
        
        A group of bacteria that have a cell wall that is structurally less complex and contains more peptidoglycan.
        
        Usually less toxic than gram-negative bacteria.