Presentation on theme: "Bacteria 100 words. Bacteria §Prokaryotes l Genetic material is not in a nucleus."— Presentation transcript:
Bacteria 100 words
Bacteria §Prokaryotes l Genetic material is not in a nucleus
Bacteria §Come in three basic shapes. §Sphere : cocci §Rod : bacilli §Spiral
Bacteria : cocci Diplococcus
Bacteria : cocci Streptococcus
Bacteria : bacilli Streptococcus
Bacteria : Spiral
Bacteria §We are not going to get back into cell structure, however, it is at least worth looking at bacteria mobility. §Flagellum l long whip like structure l spins like a propeller l Rotary joint
Bacteria §Bacteria exist in two Kingdoms. §Archaebacteria l Live in extreme environments l Acids, intestines, sewage, 110 degree water etc l Produce foul odors §Eubacteria l Live everywhere else l Many are beneficial
Bacteria Reproduction §Asexual reproduction l Reproduction with only one parent l binary fission one cell divides to form two identical cells §Sexual Reproduction l Two parents combine genetic material l Conjugation Transfer genetic material through a thin bridge
Bacteria binary fission
A tiny glimpse at the Virus Simple success
Virus §Non-living l Do not use energy to grow l Do not respond to their surroundings l Sub-microscopic l Unable to grow or reproduce outside a host cell. A host is an organism that harbors a virus or parasite.
Virus §Each viral particle, or virion, consists of just two parts l Genetic material, DNA or RNA. l A protective protein coat called a capsid.
Virus §Viruses multiply by entering a host cell and taking over cell function with its own genetic material. §The infected host cells then produce more protein and genetic material to assemble new virion.
High Resolution photomicrograph of the SimianVirus