Which of the following does not kill endospores? a) Autoclave b) Incineration c)

Question

Which of the following does not kill endospores? a) Autoclave b) Incineration c) Hot air sterilization d) Pasteurization e) None of the above 26. 27. Which of the following is best to sterilize heat labile solutions? a) Dry heat b) Autoclave c) Membrane filtration d) Pastcurization e) None of the above Which of the following best describes the pattern of microbial death? a) The cells in a population die at a constant rate b) All the cells in a culture die at once c) All of the cells in a culture are never kiled d) The pattern varies depending on tbe antimicrobial agent e) The pattern varies depending on the species 28. Bacterial death will result from damage to which of the following structures? a) b) c) d) e) 29. Cell wall Plasma membrane Proteins Nucleic acids All of the above Which of the following is bactericidal? a Membrane filtration b) lonizing radiation c) Freeze-drying d) Deep freezing c) All of the above 30. Which of the following is not a distinguishing characteristic of procaryotic cells? a) Their DNA is not enclosed within a membrane b) They lack membrane-bounded organelles c) They have cell walls containing peptidoglycan d) Their DNA is not associated with histones c) None of the above 31.

Explanation / Answer

Answer=

26]which of the following does not kill endospores.

d]Pasteurization

explaination- There are many methods for killing endospores like as Autoclav,Incineration,Hot air sterilization .

Pasteurization is the process in which foods are treated with mild heat below 1000C.

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27] The following is best to sterilize heat labile solution

c] membrane filteration

explaination= In dry heat,autoclave and pasteurization the heat is used,i.e. the higher temperature is used.

therefore not usefull for sterilization of heat labile solutions.

for heat labile solution membrane filteration is used.a membrane is a thin ;layer of semipermeable material that separates substances when a driving force is applied across the membrane.

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