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Question

A bacterial cell undergoes binary fission every twenty minutes. Starting with a single bacterium how may bacteria will be formed at the end of 3 hours?1282565121024

A
128
B
256
C
1024
D
512
Solution
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The correct option is C 512The parent cell divides to form two daughter cells through binary fission. There is a single bacterial cell which divides after every 20 minutes through binary fission. The bacterial cell divides for three hours, in which there are 180 minutes. The bacterial cell divides (180/20= 9) 9 times in 3 hours. So, the total number of bacteria formed after 3 hours are 29= 512 cells. Thus, the correct answer is option C.

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