An investigator wants to do a spread-plate to achieve a 10-5 dilition of the ori

Question

An investigator wants to do a spread-plate to achieve a 10-5 dilition of the original sample being plated Which of the following would be the O A 1 ml of a 1/10,000 dilution to the plate B 1 ml of a 1/100,000 dilution to the plate OC. 0 1 mL of B 1/10,000 dilution to the plate D 0 1 mL of a 1/1000 dilution to the plate E 0.1 ml of a 1/100,000 dilution to the plate QUESTION 12 You want to do a viable count on a water sample taken from a naturally cold arbic stream Which of the following would be the most inappopriate method to use? taken from a naturally cold aric stream Which of the following would be the most inappopriate A spread-plate B pour-plate C membrane filtration on agar D. MPN count E all of the above would be inappropriate QUESTION 13 You have done a Presence-Absence test for microorganisms in apple cider Your results show that growth occurred in the culture tubes h 1/10. 1/100 and 1/1,000 dilutions of the sample However no growth securred of organisms in the apple cider? in the 1/10 000 culture tube What do you know about the number A there are 1,000 cellis/mL of cider B there are at least 100 000 cells/mi of cider C there are between 1,000-10 000 cells/imt of cider D there are betwesn 100-1,000 cells/mL of cider bE you cannot make a decision since none of culture tubes were plate QUESTION 14

Explanation / Answer

Answer:

11. Option E: 0.1ml of 1/100,000 dilution to the plate

12. Option A: spread plate

13. Option E: you cannot make a decision since none of the culture tubes were plated

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