5/2/2013

5/2/2013

Based on carbon and energy sources, prokaryotes can be divided into 4 groups

1. Photoautrouphs

• Use energy of sunlight to build organic molecules
• Cyanobacteria

1. Chemoautotrouphs

•  Obtain energy by oxidizing inorganic substances

1. Photoheterotrouphs

• Rare

1. Chemoheterotrouphs

• use organic molecules as carbon and energy sources

Viruses

• Latin for poison
• Non-celklur particle with
• DNA or RNA
• 1 or 2 Protien coats (capsids)
• May have Viral Envelope - Phosholipids

• Do Not respire or grow
• ONLY function in a living cell
• Not given Latin names like living organisms
• 4 Charicteristics - Only have 1 (Genetic material
• Made of cells
• has metabolism
• reproduces on its own
• Genitic material

Virus have 2 different cycles
Lytic cycle

• 1- Virus absorption/ attachment
• 2 - Injection/ entry
• 3- Replication of viral parts
• 4- Assembly of the Virions
• 5- Release by lysis
• cause disease, cell gets taken over and produces more viruses that bust the cell

 Lysogenic Cycle

• Lays dormant in your body, doesn't destroy host cell

Temperate Viruses do both (HIV)