Question

# Bacteria reproduce by the process of binary fission. A population of bacteria doubles itself in 15 minute If initially one bacterium is placed in a nutrient medium, then how many bacteria will be present in the culture after an hour?

A

8

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B

16

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C

32

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D

64

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Solution

## The correct option is A 16It is given that the population of bacteria doubles itself in 15 minutes. Initial population of bacteria = 1 Population of bacteria after 15 minutes = 2 × 1 = 2 Population of bacteria after (15 + 15) minutes, i.e., 30 minutes = 2 × 2 = 4 Population of bacteria (15 + 30) minutes, i.e., 45 minutes = 2 × 4 = 8 Population of bacteria (15 + 45) minutes, i.e., 60 minutes = 2 × 8 = 16 Hence, the population of bacteria after one hour will be 16.

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