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MCQ Categories
AP Biology MCQ
Biological Macromolecules
Elements of Life
Biochemistry MCQ
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MCQ on Epistasis
Microbiology MCQ
Most Probable Number (MPN) Test
Neuroscience MCQ
281
The ability of a pathogen to spread in the host tissues after establishing the infection is known as
A:
Adhesion
B:
Invasiveness
C:
Toxigenicity
D:
None of these
282
The most important virulence factors are
A:
Adhesions
B:
Invasiveness
C:
Toxigenicity
D:
Enzymes
283
The lethal dose required to kill 50% of the lab animals tested under standard conditions is called
A:
ID
B:
LD50
C:
ID50
D:
MLD
284
The virulence of a pathogen is usually measured by
A:
LD
B:
MLD
C:
ID
D:
All of the above
285
Enhancement of virulence is known as
A:
Exaltation
B:
Attenuation
C:
Both a and b
D:
None of these
286
Reduction of virulence is known as
A:
Exaltation
B:
Attenuation
C:
Both a and b
D:
None of these
287
If a person can be infected by direct contact with infected tissue of another person, it is termed as
A:
Indirect contact transmission
B:
Attachment
C:
Direct contact transmission
D:
None of these
288
If the vectors transmit the infection mechanically, they are called
A:
Biological vectors
B:
Mechanical vectors
C:
Biological reservoir
D:
Both a and c
289
Disease that affects many people in different countries is termed as
A:
Sporadic
B:
Pandemic
C:
Epidemic
D:
Endemic
290
Hybridoma technique was developed by
A:
Kohler & Milstein
B:
Niel’s Jerne
C:
Both a and b
D:
None of these
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