Multiple choice

Which of the following units is used to measure bacterial growth?

Bacterial growth is the division of one bacterium into two daughter cells in a process called binary fission.

  1. IU/L

  2. mM fraction

  3. O.D

  4. cfu/ml

  5. cell/colony
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C Correct answer
Explanation

O.D, i. e., optical density. In spectroscopy, the absorbance, i.e., optical density of a material is a logarithmic ratio of the radiation falling upon a material to the radiation transmitted through a material. Measurements of absorbance are carried out in analytical chemistry. This measures the rate of growth of a bacterial culture.

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