Which of the following diseases is NOT caused by bacteria?
Correct answer: B. small pox
- A. tetanus
- B. small pox
- C. tuberculosis
- D. diptheria
Explanation
Smallpox is caused by a virus, the variola virus, not a bacterium. Tetanus is caused by a bacterium called Clostridium tetani. Tuberculosis is caused by a bacterium called Mycobacterium tuberculosis. Diphtheria is caused by strains of bacteria called Corynebacterium diphtheriae.
This question appeared on the ETEA MDCAT 2011 paper, which you can sit online with every answer explained.
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About Viruses
Viruses are acellular infectious particles made of genetic material enclosed by a protein capsid, sometimes with a lipid envelope. Their replication depends on a host cell and may follow lytic or lysogenic cycles, so viral structure and reproduction differ fundamentally from those of cellular organisms such as bacteria.
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