Structure and functio of bacterial cells - Endospores

4 important questions on Structure and functio of bacterial cells - Endospores

SAPS: small acid-soluble DNA-binding proteins

Saturate spore DNA and protect it from heat, radiation, dessication and chemicals.

DNA repair enzymes

Repair the DNA once the spore germinates

Two methods to kill spores

1. Household bleach
2. Sterilization (20 mins at 120C)
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7 stages of endospore formation

1. Axial filament of nuclear material
2. Inward fold of cell membrande to enclose DNA
3. Membrane engulfs immature endospore in second membrane
4. Cortex laid down between the 2 membranes
5. Protein coats formed around cortex
6. Maturation of endospore
7. Sporangium destroyed by lytic enzymes --> spore released.

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