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CBSE - Class 12 Biology Human Health and Disease Worksheet

Differentiate the following and give examples of each:
(b) Active and passive immunity

Draw a well-labelled diagram of an antibody molecule.

How does the transmission of each of the following diseases take place?
(b) Malaria

The following are some well-known abbreviations, which have been used in this chapter. Expand each one to its full form:
(b) CMI

In which way has the study of biology helped us to control infectious diseases?

How is a cancerous cell different from a normal cell?

How does the transmission of each of the following diseases take place?
(c) Ascariasis

The following are some well-known abbreviations, which have been used in this chapter. Expand each one to its full form:
(e) HIV

Differentiate the following and give examples of each:
(a) Innate and acquired immunity

10.

How does the transmission of each of the following diseases take place?
(a) Amoebiasis

11.

What is the mechanism by which the AIDS virus causes deficiency of immune system of the infected person?

12.

Name the primary and secondary lymphoid organs.

13.

Discuss with your teacher what does ‘a suitable gene’ means, in the context of DNA vaccines.

14.

What measure would you take to prevent water-borne diseases?

15.

Explain what is meant by metastasis.

16.

What are the various routes by which transmission of human immuno-deficiency virus takes place?

17.

How does the transmission of each of the following diseases take place?
(d) Pneumonia

18.

List the harmful effects caused by alcohol/drug abuse.

19.

The following are some well-known abbreviations, which have been used in this chapter. Expand each one to its full form:
(c) AIDS

20.

Do you think that friends can influence one to take alcohol/drugs? If yes, how may one protect himself/herself from such an influence?

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