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NEET MDS Quiz - Practice Test
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Practice Test

General Microbiology - 3 Questions

1
General Microbiology

What is the primary mechanism of action of the PCR test in diagnosing HIV infection?
1) Amplification of viral RNA or DNA
2) Detection of specific antibodies to HIV
3) Detection of the HIV virus directly
4) Measurement of the immune response to the virus

📝 Explanation:

The primary mechanism of action of the PCR test in diagnosing HIV infection is the amplification of viral RNA or DNA, allowing for the detection of the virus.

2
General Microbiology

What is the typical macroscopic appearance of the stool in cases of amoebic dysentery compared to bacillary dysentery?
1) Amoebic dysentery stool is small and odorless, while bacillary dysentery stool is copious and offensive.
2) Both amoebic and bacillary dysentery stools are copious and offensive.
3) Amoebic dysentery stool is dark red and acidic, while bacillary dysentery stool is bright red and alkaline.
4) Amoebic dysentery stool is bright red and alkaline, while bacillary dysentery stool is dark red and acidic.

📝 Explanation:

Amoebic dysentery stool is typically dark red and acidic, while bacillary dysentery stool is bright red and alkaline.

3
General Microbiology

What is the unique feature of S. gallinarum-pullorum compared to other Salmonella species?

1) It is always motile.

2) It is always nonmotile.

3) It ferments mannitol.

4) It is always a pathogen in humans.

📝 Explanation:

the unique feature of S. gallinarum-pullorum compared to other Salmonella species is that it is always nonmotile. This is in contrast to the typical motility of Salmonella species, which is conferred by the presence of flagella.

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