Q7 of 57 Page 415

Write true or false for the following statements :

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

False

High blood pressure can occur due to excessive weight and lack of exercise whereas cancer may occur due to genetic defects.


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5

Write true or false for the following statements :

Chronic diseases have very drastic long-term effects on people’s health as compared to acute diseases.

 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.

 8

Write true or false for the following statements :

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

 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.