Internal Structures of Prokaryotes

Internal Structures of Prokaryotes

1. Rribosomes

   • consists of protein and rRNA
   • site of protein synthesis
     • it can be inhibited by certain antibiotics

2. Plasma membrane

   • encloses the cytoplasm
   • phospholipid bilayer
   • selectively permeable
   • chromatophores
     • contains pigment involved in photosynthesis

3. Nuclear areas

   • contains DNA of chromosome
   • Bacteria can also contain plasmids which are circular and extra-chromosomal DNA molecules

4. Inclusions

   • among of the inclusions found in bacteria are metachromatic granules and polysaccharide granules
   • Magnetosomes
     • present in several gram-negative bacteria
     • act like magnets

5. Endospores

   • Resting structure formed by bacterias for survival during adverse condition
   • Two genera that commonly form endospores are Bacillus and Clostridium

6. Cytoplasm

   • Fluid component inside plasma membrane,DNA,ribosomes and inclusions
   • mostly water,which is organic and inorganic molecules

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