Question

If yeast is allow to grow for 270 minutes then calculate number of yeast would be formed after 270 minutes
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Answer 1

Answer:

a yeast divide after every 90 min

so it would divide 3 times

that is the no. of yeast would be 2^ 3

i.e 8

Answer 2

Number of yeast would be formed after 270 minutes are :

• A single-celled fungus that ferments sugar to produce alcohol and carbon dioxide is known as yeast and in commercial product containing living yeast cells that is used in baking to make dough rise and in the making of alcoholic beverages .

• Yeast cells generally have a doubling time of 90 minutes at room temperature.
• So if you divide 270 by 90 , you get a count of 3 cycles.
• Now that being said, this question is not complete without reality check parameters of cell culture pH, temperature, and antimycotic concentrations.
• We count the yeast cells in the central square of the hemocytometer.
• Yeast cells have an average size of 5-10μm.
• When compare to the size of a hemocytometer square (1mm), they are  100-200 times smaller.
• So,we should count the smaller squares in this case .