You pipette 1mL from a 30mL starting culture into a 99mL blank labeled A. You plate 1mL and 0.1mL of blank A onto plates B and C, respectively. Plate B has 310 colonies and Plate C has 31 colonies. What is the total cfu of the original culture? Select one: a. 9.3e5 b. 3.1e3 c. 3.1e4 d. 9.3e4 e. 3.1e5

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A: In order to allow growth on plates containing the antibiotic kanamycin, we transformed E. coli cells…

Q: A 37 year old male comes to a free clinic in the middle of a metropolitan city.  He said he does not…

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Q: You are running an ELISA to test three patients for COVID-19.The results of the test are shown below…

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Q: During this outbreak, some people sickened with listeriosis testedpositive for Listeria…

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Q: In a plate count, 1 mL of culture is spread on a plate and incubated for 24 hours. 250 colonies are…

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Q: Which of the following compounds represents a peptidoglycan specific antibiotic ? A. tetracycline B.…

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Q: If you didn’t get countable colonies and are not able to calculate CFU, consider the possible…

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Q: Which of the following would be used to identify an unknown bacterialculture in your nursing school…

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Q: You collected 1000 mL of river water from the stream running through campus. You prepared dilutions…

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Q: Which of the following is FALSE about interpreting the results of normal microbial flora experiment?…

A: Huge diversity of microbial flora could be found with the skin and mucous membranes of the hosts…

Q: Which one of the following is not true about PEA medium?   Select one:   a. Contains sodium…

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Q: The volume of E. coli added to each warm agar pour/virus mixture was originally100µL.  After…

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Q: A cell is 25 μm wide when viewed at 1,000× magnification. Thismeasurement can also be written…

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Q: he main benefit of a three-dimensional culture system is that: O the morphology and behavior of…

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Q: If you plated 0.1mL of a 1:100 dilution of phage stock onto a plate with an E.coli lawn, what is…

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Q: You collected 1000 mL of river water from the stream running through campus. You prepared dilutions…

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Q: commercial sterilization is designed to provide enough heat to destroy the endospores of what…

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Q: If the organism is a pony which of the following tests would be positive  a cellular respiration…

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Q: Which ONE of the following is not taken into consideration when determining the ‘clinical…

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Q: Choose the one answer that fits best. Which of the following statements regarding loading the well…

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Q: The bacterium Dontuplodemeus tocheggus has a generation time of 20 minutes. Starting with one cell…

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Q: Define the following: 1.  Morphology -  2.  Colony -

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Q: They want to determine if the samples contain a toxin or a virus. Material from each sample is used…

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Scientific Notation

We have to deal with quantities that are extremely large or very small. For example- I may have 6,500,000,000 red blood cells, or the diameter of an iron atom is 0.000000011 inches. Numbers with many zeros can be inexpedient to work with, so scientists use scientific notation. It represents very large numbers or very small numbers in a simple form. We know that whole numbers can be extended to infinity, but we cannot write such large numbers on paper. Numbers that present in millions of places after the decimal point need to be represented simply. Thus, it is difficult to represent a few numbers in their extended form. Therefore, we use scientific notation.