What is the fraction of light emitted by a fluorophore that will be transferred to the detector? A.20 à 30% B.40 à 50% C.5 à 10 % D.98 à 99%

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When Miescher added the alkaline solution, the cells lysed. What does this mean?   A. They mutliplied.   B. They became stronger.   C. They broke open.   D. They froze in time.

Which of the following specimens cannot be tested on the Velocity Macroscopic Chemistry Module? a. Gross Hematuria b. Specimens <2 mL c. Pyridium d. Diluted Specimens e. All of the above

the transfer of genetic material during bacterial conjugation requires? a. flagella b. sex pili c. periplasmic flagella d. fimbriae e. cilia

During the ____________________ phase of microbial population growth, the rate of cell division begins to slow down or division stops entirely.   a. stationary b. lag c. death d. exponental growth

You are given a cell stock A. You make a 1:100 dilution and load 10µL diluted sample to a hemocytometer. After counting all 5 "one millimeter squares" you get an average of 60 cells. Then you decide to do a 1:1000 dilution to verify your counting. How many cells do you expect to get in average with 1:1000 dilution? Select one: a. 6 b. 12 с. 30 O d. 20 To do a 1:100 serial dilution. This is what you will do: Select one: a. You take 1uL of original cell stock and add into 99 uL of 1×PBS to make a 1:100 dilution b. You take 90uL of cell stock and add that into a tube containing 10uL of 1x PBS. c. You take 99uL of cell stock and add that into a tube containing 10uL of 1×PBS. d. You take 10uL of original cell stock and add into 90 uL of 1x PBS to make a 1:10 dilution. You thoroughly mix the 1:10 dilution tube. Then you take 10uL out from 1:10 tube and add it into a new tube containing 90uL of 1×PBS.

How did Charcot define a sympton? A. as something directly observed by the examining physian B. as something experienced and reported by the patient C. something that that occurred in patients with various diseases D. as something that could be observed with a microscope

Select all of the pathways that can lead to pore production in a microbial cell.   A. Alternative   B. Lectin   C. Classical