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  • Microbial Growth (GATE)
  • An 11 : 100 diluted bacterial sample results in an averag...
Multiple choice

An 11 : 100 diluted bacterial sample results in an average of 10 bacteria in each ruled square of Petroff Haussar counting chamber. How many bacteria are present in the sample?

  1. 2 x 108

  2. 108

  3. 1010

  4. 2 x 1010

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

2 x 1010 is the right answer. Number of bacteria = 10 x 20,000,000 x dilution factor (100) = 2 x 1010

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