1.1 Cell structure

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Question 14
Medium

A biologist measures the concentration of yeast cells in a liquid culture using a specialized counting chamber.

Here is the method used:

  1. Dilute 2.0 cm32.0\text{ cm}^32.0 cm3 of the culture to a total volume of 10 cm310\text{ cm}^310 cm3 with distilled water.
  2. Place a drop of this diluted culture on the counting slide.
  3. Place a coverslip over the slide to set a liquid depth of 0.1 mm0.1\text{ mm}0.1 mm.
  4. Count the number of yeast cells within a 0.2 mm×0.2 mm0.2\text{ mm} \times 0.2\text{ mm}0.2 mm×0.2 mm square grid.

The biologist counted 181818 yeast cells in the 0.2 mm×0.2 mm0.2\text{ mm} \times 0.2\text{ mm}0.2 mm×0.2 mm grid area.

Calculate the number of yeast cells in 1.0 mm31.0\text{ mm}^31.0 mm3 of the undiluted yeast culture.

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1.1 Cell structure Questions

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