A plate dilution of 10–8 produced a total of 137 colonies. What was the original concentration in the sample? How many colonies should be on the plate inoculated with a sample volume of 10-7using the same sample? How many colonies should be on the plate inoculated with a sample volume of 10–9 using the same sample

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02-03-2020
Biology

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A plate dilution of 10–8 produced a total of 137 colonies. What was the original concentration in the sample? How many colonies should be on the plate inoculated with a sample volume of 10-7using the same sample? How many colonies should be on the plate inoculated with a sample volume of 10–9 using the same sample

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henrifrank henrifrank · Answer 1 · 2020-03-04T14:56:38+01:00

Answer:

The original number of colonies was 13700000000. The number of colonies using the same sample at [tex]10^{-7}[/tex] dilution would be 1370. The number of colonies using the same sample using [tex]10^{-9}[/tex] dilution would be 13 or 14 colonies.

Explanation:

The dilution of colonies is based on how many times you dilute and usually is determined by 10 to the power of some number. That number (power) adds (if it's positive) or removes a zero (if it's a negative number) from the total number of colonies.