Microbiology with Diseases by Taxonomy Chapter 9 Answers 1CT
The antimicrobial agents used for longevity of sandwich:
Explanation
Grilled cheese sandwich is a diary
product, which attract microorganisms quickly, if necessary precautions are not
taken.The supplier had stored the sandwich
in an air tight box for ten years without decay or the growth of mold by using
antimicrobial chemical.
1.The
chemical agents include nisin and natamycin that reduce the growth of bacteria
and fungi in cheese.
2.The
physical agent he used for preservation is ultra high temperature sterilization
of moist heat that denatures proteins and destroys membranes of microbes.
3.
Desiccation is also used for preservation and inhibits the metabolism of
organisms.
Microbiology with Diseases by Taxonomy Chapter 9 Answers 1CM
Microbiology with Diseases by Taxonomy Chapter 9 Answers 1MC
1.Sterilization can eliminate harmful microorganisms but
hard to eliminate viruses as they do not have protein coat to sterilize.
2.The process of sterilization needs destruction of the
protein coat and eventually killing the organism.Hence, the option (b) is incorrect.
3.Sterilization cannot eliminate prions as they are one of
the viral particles that lack protein coats. Hence, the option (c) is incorrect.
4.Sterilization cannot eliminate hyperthermphiles because
these organisms can tolerate high temperatures. So, this process cannot work on
these organisms. Hence, the option (d) is incorrect.
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