Which of the following is MOST effective against resistant endospores? a) autocl

Question

Which of the following is MOST effective against resistant endospores? a) autoclaving b) boiling c) pasteurization d) All of these are equally effective against resistant endospores The first product to be commercially treated by pasteurization was a) milk b) wine c) beer d) cheese The disinfectant of choice for municipal water supplies is _____. a) fluorine b) Chlorine c) ultraviolet light d) ammonia Antiseptics arc generally regulated by the a) Food and Drug Administration b) Environmental Protection Agency c) The National Institutes of Health d) Centers for Disease Control and Prevention. Media containing some ingredients of unknown chemical composition are called _____ media a) undefined b) complex c) defined d) synthetic All fastidious microorganisms require which of the following for growth? a) oxygen b) temperatures near normal for the human body c) extra nutrients (such as whole blood) e) iron A bacteriophage that can integrate its genome

Explanation / Answer

15) Which of the following is MOST effective against resistant endospores?
A. autoclaving B. boiling C. pasteurization D. All of these are equally effective against resistant endospores.

ans- A

16)The first product to be commercially treated by pasteurization was A. milk B. wine C. beer D. cheese

ans-B

17). The disinfectant of choice for municipal water supplies is __________.
A. fluorine
B. chlorine
C. either fluorine or chlorine
D. ultraviolet light

ans- B

18).Antiseptics are generally regulated by the
A. Food and Drug Administration.
B. Environmental Protection Agency.
C. The National Institutes of Health.
D. Centers for Disease Control and Prevention

Ans- A

19).Media containing some ingredients of unknown chemical composition are called __________ media.
A. undefined
B. complex
C. defined
D. synthetic

ans- complex

20).All fastidious microorganisms require which of the following for growth?
A. Oxygen. B. Temperatures near normal for the human body.C. Extra nutrients (such as whole blood). D. Iron.

ans-Extra nutrients (such as whole blood).

21).A bacteriophage that can integrate its genome into the host chromosome and not cause lysis of the host cell is said to be A. virulent. B. avirulent. C. moderate. D. temperate.

ans-D

22).

Preservation methods such as salting result in the _____ microbial cells
A.loss of salt from
B.gain of water into
C.loss of water from
D.lysis of

Ans-C

23).The __________ is a group of proteins needed for DNA synthesis that assembles at the origin of replication.  A. septum B. replisome C. prospore D. none of these

ans-replisome

24).chloride dioxide can be used to a)clean open wounds b)treat water supplies c)sanitize air ducts d)clean meat

ans-b

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