Question

Given that bacterium has generation time of 0.5 h, starting with an initial inoculum of 2 x 105 the count after 3 h

of culture will be

a) 3.2 x 106 b) 6.4 x 106 c) 12.8 x 106 d) 12.8 x 107

Answer 1

0.5h = 2 x 105

after 3h = 0.5+0.5+0.5+0.5+0.5+0.5

             =2x105+2x105+2x105+2x105+2x150+2x105

             =1260