Question

Lab 9 Review Name 8 12x4 Why do you think that some your TSA plate? Date microorganisms present in/on the location you sampled did not grow on Section 12,800X 9 What are biofilms and how are they formed in nature? Give examples of biofilms. fthe 12 0 the 2 10 Imagine that you have an agar plate with 3 isolated colonies formed by bacteria A, B, C and with generation times of 30, 60 and 120 minutes, respectively (generation time the time it takes for the population to double). If the initial numbers are: A=50, B = 100 and C=200 cells, how many cells would you expect to find in those colonies after a 2-hour incubation period?

Answer 1

Lab 9 Review Name 12%4 Date Section 8 Why do you think that some your TSA plate? microorganisms present in/on the location you sampled did not grow on Trypticase soy agar medium (TSA) is a complex medim, which is a rich source of protein digest and soy product. Organisms growing on TSA they need not synthesize by expending energy. Not all organisms grow on TSA plate because acquire necessary growth factors or vitamins from the growth media can 1. If they 2. If the temperature is too low or too 3. If the medium is too concentrated 4. If the medhum is deficit of required growth factors 5. If the organism is photosynthetic obligate anaerobes are high 9 What are biofilms and how are they formed in nature? Give examples of biofilms. Biofilm refers to group of microbes living together within an extracellular polymeric substance matrix produced by themselves. The Biofilm formed by the microbes allows them to get established at a site and protect it from the chemicals or drugs. So, it is important for an organism to infect the host living (oral structures), and non-living (medical devices) surfaces Biofilms can be formed on