General Science – Bacteria, Fungi

  • The term antibiotic was coined by Selman Waksman in 1942.
  • Bacteria were discovered by Anton Von Leeuwenhock.
  • Bacteria are classified based on shapes into Cocci, Bacilli, Spirilli and Vibrio.
  • Gram positive bacteria retain purple colour with gram stain.
  • The nuclear material of bacteria is called nucleoid.
  • Extra nuclear rings of DNA found in bacteria are called plasmids.
  • Bacterial photosynthesis does not use water.
  • Transformation, Conjugation and Transduction are the types of sexual reproduction seen in bacteria.
  • Antibiotics like streptomycin, bacitracin are obtained from bacteria.
  • Fungi in association with algae form lichens.
  • The plant body of fungi is called mycelium.
  • Fungi consists of eukaryotic cells.
  • Penicillium reproduces asexually by the formation of conidia.
  • In 1929 Alexander Flemming made a discovery that the fungus penicillium could produce an antibacterial substance which he called penicillin.


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One response to this post.

  1. Posted by nandhu on January 5, 2012 at 3:29 pm

    Thank you sir…

    Reply

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