INTERNAL STRUCTURES OF PROKARYOTES

INTERNAL STRUCTURES OF PROKARYOTES

1. PLASMA MEMBRANE

   • selectively permeable barrier
     • fluid mosaic
   • synthesizes cell wall components

2. MOVEMENT OF MATERIALS ACROSS MEMBRANES

   • passive processes
     • simple diffusion
     • facilitated diffusion
     • osmosis
   • active process
     • active transport
     • group translocation

3. CYTOPLASM

   • the substance of the cell inside plasma membrane
   • major structures are DNA, ribosomes and inclusions

4. PLASMID

   • small circular, double stranded DNA
   • extrachromosomal genetic elements

5. RIBOSOMES

   • sites of protein synthesis
   • can be inhibited by certain antibiotics

6. INCLUSIONS

   • reserve deposits
   • can serve as a basis of identification

7. ENDOSPORES

   • resting structures formed by some bacteria for survival during adverse environmental conditions