Microbiology with Diseases by Taxonomy Chapter 6 Answers 1CT
The characteristics of an organism are given by a scientist as:
Chemoheterotrophic:
A chemoheterotroph is an organism, which uses organic compounds as its source of carbon and source of energy.
Aerotolerant:
Aerotolerant organisms are those organisms, which prefer an atmosphere without oxygen. Since they are aerotolerant, these organisms
can tolerate low levels of oxygen.
The labeled thioglycollate tubes are shown below:
Microbiology with Diseases by Taxonomy Chapter 6 Answers 1MC
(a) An anaerobe:
An anaerobe cannot grow on a Petri plate. An anaerobe can grow only under specially maintained conditions. Oxygen should not be
present for the growth of an anaerobe. In a Petri plate, aerobes usually grow. Viruses cannot grow on agar in a Petri plate.
Hence, the option (a) is incorrect.
(b) Viruses on an agar surface:
Viruses cannot grow on agar surfaces in Petri plates. Viruses can grow only on specialized growth medium. They can also be grown
in tissues like the egg. Viruses can grow on monolayers of bacterial cells. A colony of agar surface can grow in a Petri plate, in a lab.
Hence, the option (c) is incorrect
(c) Barophiles:
Barophiles cannot grow on agar in a Petri plate. Barophiles are organisms, which live in areas of high pressures. Such pressures
cannot be maintained in a laboratory; hence, cannot grow in a Petri plate. Organisms like viruses cannot grow on agar in the lab.
Hence, the option (d) is incorrect
(d) A colony on an agar surface:
A colony on an agar surface can grow in a Petri plate in a lab. A colony usually means a bacterial or fungal colony.
Only aerobes can grow in Petri plates. The growth of anaerobes can be seen only in special jars like the Gas Pak jar.
Barophiles cannot grow on culture. Thus, a colony on an agar surface can grow on a Petri plate in the laboratory.
Hence, the correct option is (b) a colony on an agar surface.
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