25). A is more better and last longer as it is more concentrated...
26). Alcohol causes denaturation of protein and dissolve lipids...
Aqueous ethanol (60-95%) and isopropanol are used..
Silver only causes denaturation of protein..
27). The forms of ionizing radiation used for sterilization are known as gamma irradiation, electron irradiation and x-ray irradiation. this means that the ionizing radiation directly or indirectly causes damage to the genetic material - DNA or RNA - inside of the microorganisms. If the DNA or RNA is damaged, the cell will die.
T r esponse Question 25 Question 25 of Use dilution values for disinfectant Als longest when...
T r esponse Question 25 Question 25 of 3 Use dilution values for disinfectant Als 12 and disinfectants longest when used properly?" 1.10.000. Both were the under the same conditions and are ned for the purc 1 points which h ad 100 of A and would lost the same amount of time used properly not enough information is provided
Question 28 What is not a factor in altering thermal death point? O time organic matter O heat resistance of microbe O media used O microbial characteristics Question 29 Why is Mycobacterium often resistant to disinfectants? O acid-resistant cell wall O endospore formation O metabolism O anaerobic behavior genetic recombination Question 30 Which causes protein denaturation and is effective against enveloped viruses? alcohols O halogens o organic acids O biguanides silver
"Three organisms were innoculated on a culture media. Results showed Escherichia coli as red colonies, no growth of Staphylococcus epidermidis, and colorless colonies of Salmonella enterica. The medium is:" a selective and differential b differential c selective d minimal e heterotrophic "A bacterium was incubated with aeration in a nutrient medium containing two carbon sources. After logarithmic growth, a lag phase was observed for 25 minutes. Then logarithmic growth at a slower rate was observed. Which substate was preferred by...