How would you classify Halobacterium salinarium as to salt needs? Check one.--------Obligate halophile ----------Halotolerant-----------Osmotolerant
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How would you classify Halobacterium salinarium as to salt needs? Check one.
--------Obligate halophile ----------Halotolerant-----------Osmotolerant
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- The principle and What type pf Media of the following Conkey Agar vii) MacConkey Broth viii) TSA Base for Blood and chocolate Agar ix) Mannitol Salt Agar x) Tryptic Soy Agar xi) Alkaline peptone water What is the principle of Growth Medium and Culture medium?Listen The following is a recipe for a bacterial growth medium: 35 g Dextrose, 12 g Agar, 1.2g Salt, 3 g Yeast cell extract, 20g tryptone. Based on the recipe, what type of growth medium would this be? A) Chemically defined growth medium B) Minimal growth medium C) Complex growth medium D) Chemically undefined growth medium E) More than one of the answers is correct.essential oils have been studied as potential antimicrobial agents. These naturally occuring compounds are linked to having the following type of activity in clinical trials: virucidal, septicidal, bactricidal, fungicidal
- Anaerobic bacteria produces which of the following inhibitory toxic product? -methilane -cyanide oxides -fatty acids -sulphidesWhich form of the Coomassie dye do you expect to be more prevalent in a low pH solution? Group of answer choices A) Blue B) Red C) Green1(a)What is a psychrotroph? (b)From what natural sources would you isolate a thermophile? A psychrophile? (C)How does temperature affect the growth of a microorganism? (D)State the temperature class for Escherichia coli, Bacillus sp, Aeromonas sp, Micrococcus luteus, and suggest their optimum growth temperature. 2 (a)Why is dilution important when determining microbe number? (B)How does a decrease in dye colour intensity affect the microbe ? (C)State the possible sources of error if plate counts and colour intensity of dilutions are incorrect or Precautions taken to prevent this from happening. ( this is not a graded assignment)
- Temperature plays a very important role in the growth of fungi, bacteria, and other microorganisms. Most bacteria grow at optimal temperatures. Mesophiles are grown mainly at optimum temperature. What is is the impact of the above on a) on unpasterized milk? 2. Expired date and off-putting odor?Define ‘thermal death point’ and ‘thermal death time’ How does the addition of salt or sugar help preserve food? Why were chemical disinfectants once commonly compared with phenol? When is using a broad-spectrum antimicrobial drug warranted?In some cases, why does a chemical is more effective as a microbicide when it is diluted rather than full strength?
- A chemolithotroph would use which of the following as a source of energy? magnetic field glucose light H2An obligate halophile is an organism that requires high osmotic pressure.True or false?What is sterilization? Give specific examples of media which are sterilized by the following methods:A. Boiling or heating onlyB. Autoclave using steam under pressure.C. Inspissator