Q8 of 57 Page 415

Write true or false for the following statements :

All viruses live outside host cells whereas bacteria very rarely do.

False

Viruses need a host body to replicate and as such it is impossible for viruses to live without a host.


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6

Write true or false for the following statements :

All diseases have immediate and contributory causes. Most of the diseases will have many causes, rather than one single cause.

 7

Write true or false for the following statements :

High blood pressure and cancer have mostly external causes and are generally caused by infectious agents.

 9

Write true or false for the following statements :

Antibiotics commonly block biochemical pathways important for bacteria. But viruses do not use these pathways at all, and that is the reason why antibiotics do not work against viral infections.

 10

Write true or false for the following statements :

Syphilis and AIDS are transmitted by casual physical contacts.