MCQ practice · SSC Biology Board questions · Chapter 11: Reproduction in Organisms
By which germ has Mr X been infected?
Think it through first, then pick an option.
- a Pneumococcus
- b Mycobacterium tuberculosis
- c Human Immune Deficiency virus
- d Hepatitis B virus
Answer and explanation
Correct answer: c Human Immune Deficiency virus
Fever over a month, loose motions, dry cough, neck and armpit pain and no medicine are signs of AIDS, caused by the Human Immune Deficiency Virus.
Why the other options are wrong
- a Pneumococcus: Pneumococcus is the germ of pneumonia, not of the disease in the stimulus.
- b Mycobacterium tuberculosis: Mycobacterium tuberculosis causes tuberculosis; the symptoms and lack of medicine in the stimulus fit AIDS.
- d Hepatitis B virus: The hepatitis B virus causes a liver disease; these symptoms are not its signs.
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