7:01 PM a mybb.qu.edu.qa .11 Oored00 80% 3 of 3 9-The time required for a cell t
ID: 151937 • Letter: 7
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7:01 PM a mybb.qu.edu.qa .11 Oored00 80% 3 of 3 9-The time required for a cell to undergo binary fission is called the: a exponential growth rate b. growth curve c.generation time d. lag period e stationary phase 10-A visible cluster of cells that have arisen from one parent cell growing on the surface of a growth medium is called a: a. bacterium b.inoculum c.virulence d. colony 1-Why microorganism placed in high concentrations of salts and sugars undergo lysis? 2-Why autoclaving is the most effective method of moist heat sterilization 3- Why is it difficult to define psychrophile, mesophile, and thermophile? 4-Which of the sterilization method does not kill bacterial endospores?Explanation / Answer
9)generation time
10)Bacterium
1)To prevent from UV rays because that will cause irreversible breaks in DNA strands.
2)cause it is non toxic,less expensive, microbicidal,sporicidal.It rapidly penetrates fabric.
3)Psychrophiles are cold loving Microbes.Mesophiles lives in moderate temperature.These causes food spoilage,disea di mostly.Thermophiles are heat lobers.found in extreme heat condition.Now problem arises here to define them cause if Psychrophiles are cold lovers found in 0degree then there are other organisms too which have these criteria,and all these three are not rigidly defined.
4)Boiling,drying,limited heat technology,are some of the technique by which endospores of bacteria is not killed.
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