medium in which all the components are known is: A. Minimal medium B. Synthetic or defined medium C. Selective medium D. Complete medium E. Complex medium F. Differential medium G. General purpose medium

Microbes that can be grown on agar petri dish include A. Bacteria B. Virus C. Fungi D. Protests E. Helminths.

Which isolation technique is best used in isolating microorganisms (in countable good plates) from a gram of soil sample with expectedly high microbial count?  A. Streak Plate technique B. Serial Dilution-Pour Plate technique C. Spread Plate technique D. Hanging Drop technique 2. Which materials are needed in isolating bacteria using Streak Plate technique? Check all that apply.  ( )nutrient agar plate ( ) inoculating loop ( ) microbial inoculum ( ) flame source 3. Which term refers to that solution of sterile distilled water/normal saline/peptone water used to "thin out" dense microbial populations in Serial Dilution-Pour Plate technique used in the isolation of microorganisms?  A. inoculum B. culture medium C. diluent D. microbial culture

Based on the growth curve, which ONE of the following best describes what would happen if sample of culture in the presence of drug B is inoculated onto drug-free growth medium?   Select one: A.   Growth present, but cell count increased by at least 99.9% of the original culture   B. No growth after 24 hrs C. Growth at 24 hrs D. Not possible to predict because the culture could either be alive or dead E. Growth present, but cell count reduced by at least 99.9% of the original culture

A. Antibiotics, such as gentamicin, are used in media to prevent growth of susceptible microbes. Is gentamicin media a selective, differential or enrichment media? B. Sorbitol is a sugar alcohol that all Escherichia bacteria can normally ferment into an acidic waste compound. This acidic end product is detected by including a pH indicator in the agar and noticing a color change. The strain of Escherichia that is a common food pathogen, E. coli O157:H7, however can not ferment sorbitol. It will grow similar to other E. coli, but not change the agar color. Is sorbitol in nutrient agar a selective, differential or enrichment media?​

For an estimation of microbial population experiment, you obtained the following results: A. 1000X dilution with 0.1 mL sample volume - 470 colonies B. 10000X dilution with 0.1 mL sample volume - 250 colonies C. 100000X dilution with 0.1 mL sample volume - 100 colonies D. 1000000X dilution with 0.1 mL sample volume 12 colonies For each set of results, determine if the samples are countable plates, and for only the countable plates, calculate the CFU/mL for those plates. For plates that are not countable, please state that and do not perform the calculation (please note that calculating the CFU/mL for a plate that is not countable will be marked as incorrect).