[2 Mark Question Answer]

Question 12 Marks

Name the causative germ of $AIDS$. How is this disease transmitted?

Answer

Causative germ of $AIDS$:
$HIV$ (Human immunodeficiency virus)
Transmission of $AIDS$:
$(a)$ Sexual intercourse
$(b)$ Mother to child transmission
$(c)$ Contaminated blood transfusions

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Question 22 Marks

Why is it important to know how the germs leave the body of a patient?

Answer

It is important to know how the germs leave the body of a patient as there are some diseases and infections which are transmitted through air, water or just by direct contact. Therefore, to take precautions and protect others from further infections, it is a must to know how the germs leave the body of an infected person.

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Question 32 Marks

Name any four non-infectious diseases and their causes.

Answer

NON-INFECTIOUS DISEASES	CAUSE OF THE DISEASE
Asthma	Allergy
Cataract	Ageing
Beri-Beri	Nutritional deficiency
Cancer	Carcinogens like chemicals, tobacco smoking, pollution etc.

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Question 42 Marks

What are the different ways in which infectious diseases can spread?

Answer

The different ways in which infectious diseases can spread are as follows:

Direct contact: Person to person, animal to person and expected mother to child
Indirect contact: Doorknob, phone, etc.
Droplet transmission: Sneezing, coughing, etc.
Particle transmission: Air particles can transfer infectious diseases
Bites and Stings: Mosquitoes, lice, ticks, etc.
Food Contamination: Food, beverages, etc.

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Question 52 Marks

Write very briefly about the following:
Chicken pox

Answer

It is a viral disease caused by the HerpesVaricellazoster virus. It spreads rapidly by close contact with an infected person. A live attenuated vaccine containing Varicella is administered to children of $12-18 $months for active immunisation.

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BIOLOGY [2 Mark Question Answer]

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