BIO 250 LAB 3 Questions With Correct Answers | Latest Graded | STRAIGHTERLINE
Which quantitation methods can be used to determine the number of living and dead cells in a sample? Select one: a. turbidity determination and direct microscopic count b. direct microscopic count and direct plate count c. filtration and direct plate count d. filtration and turbidity determination The correct answer is: turbidity determination and direct microscopic count Which quantitation method(s) do not require bacteria to be grown on solid media? Select one: a. turbidity determination and filtration b. turbidity determination, direct microscopic count, and most probable number c. filtration, direct plate count, and most probable number d. most probable number only The correct answer is: turbidity determination, direct microscopic count, and Question 3 Incorrect Mark 0.00 out of 4.80 Flag question Question 4 Incorrect Mark 0.00 out of 4.80 Flag question Question 5 Correct Mark 4.80 out of 4.80 Flag question most probable number If you plate 0.1mL of a 10 dilution onto an agar plate and 60 colonies grow, what is the population density of your original sample? Select one: a. 60,000 CFU/mL b. 6,000 CFU/mL c. 600 CFU/mL D.300 CFU/mL The correct answer is: 60,000 CFU/mL If there are 60 colonies present on a 10 serial dilution plate, approximately how many colonies should be present on a 10 serial dilution plate? Select one: a. 120 b. 6 c. 600 d. 30 The correct answer is: 6 You obtain the following results after plating a serially diluted bacterial sample onto four nutrient agar plates
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