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Dbligate aerobe: needs lflfl% of oxygen for growth at the top layer
nerotolerant anaerobe: can tolerate oxygen but does not use it growth from
top to bottom Ubligate anaerobe: 1Dfl% [302 growth at the bottom of tube Facultative anaerobe: can growth with or without 02 spread out 28. Why was it necessary to take a reading of plain BHI broth with the
spectrophotometer before reading our bacterial samples?
Because you want to only know the measurement for the bacterial sample
without the BI-fl Broth so you can get an accurate reading without the BI-fl
broth interfearing. 29. What are psychrophiles, mesophiles and thertnophiles? Which are most
likely to cause disease in humans?
Psychrophiles organisms that can survive cold temps. Mesophiles survive in
most common temps. Thermophiles grow in high temps. 3U. How can pH and osmotic pressure be used to control (inhibit) microbial
growth? Give an example from your daily life.
The control growth with hydrogen or some other chemical that can absorb
the concentration inside and outside of the cell. An example is when you
cook rice it absorbs the water. 3 1. How can temperature be used control microbial growth? Give an example
from your daily life.
Temp can control growth through the environment in which the enzyme will
act. An example would be if I put my food in the fridge the temp would slow
down the functions of the cell that like what can so in and out of the cell.

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Methylene blue indicates oxygen content of the medium by exhibiting bluish-green colour at the top of medium. Obligate... View the full answer

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