Bacillus thuringiesis

Question 1

what happens during sporulation

Answer 1

species synthesizes endospore and crystal made from subunits of a toxic protein

Question 2

how is the toxin activated

Answer 2

insects with alkaline gut solbulizes the crystal produces portoxin, insect protease cleaves protoxin producing an active toxin

Question 3

how does insect die

Answer 3

subunits of toxin form a pore in the PM of insect’s gut. contents leak out provide trigger for germination and nutrient for outgrowth and return of cell to veg. state.

Question 4

what is Bt

Answer 4

and insecticide with large quantities of Bacillus thurigensis