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This quiz contains multiple-choice problems on batch sterilization, continuous and filter sterilization.
Which of the following is not a type of sterilization?
What do you mean by sterilization?
If the foreign microorganism invades the fermentation, which of the following is not likely to occur?
Which of the following reaction occurs during the sterilization which results in browning of media?
Which scientists introduced the term ‘Del factor’?
The highest feasible temperature for batch sterilization is
124 °C
120 °C
122 °C
121 °C
Which of the following instruments works on the principle of Batch sterilization?
Incubator
Autoclave
Centrifuge
LAF
The destruction of microorganisms by moist heat is described as a
Zero-order reaction
First-order reaction
Third-order reaction
Second-order reaction
Contamination can be avoided by sterilizing the fermenter vessels only. True or false?
True
False
The del factor increases with an increase in the fermenter size. True or false?
True
False
The long exposure of batch sterilization may lead to
Purification of media
Recovery of media
Degradation
Good quality of product
What is the advantage of Batch sterilization over continuous sterilization?
Superior maintenance of medium quality
Ease of scale-up
Automatic control
Lower equipment costs
The equation for del factor is
∇ = ln (N{0}/N{t})
∇ = ln (N{t}/N{0})
∇ = ln (N{0})
∇ = ln (N{0}*N{t})
The Del factor decreases as the initial number of organisms
Decreases
Increases
Remains constant
Becomes zero
How long does it take for the autoclave to complete its cycle?
30-35 min
50 min to 1 hr
15-20 min
10-15 min
