biology - human health and disease

Class 12 - Biology

Human Health and Disease

Q&A
Question:

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

Answer:

Suitable genes refers to that gene (specific segment of DNA), encoding a protein associated with the target infectious organism, is spliced into plasmid, which is then copied & formulated as a vaccine.



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Questions and Answers


Human Health and Disease - Questions
1.

In your view what motivates youngsters to take to alcohol or drugs and how can this be avoided?


Answer
2.

Explain what is meant by metastasis.


Answer
3.

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


Answer
4.

Why is that once a person starts taking alcohol or drugs, it is difficult to get rid of this habit? Discuss it with your teacher.


Answer
5.

Name the primary and secondary lymphoid organs.


Answer
6.

List the harmful effects caused by alcohol/drug abuse.


Answer
7.

What measures would you take to prevent water borne diseases?


Answer
8.

Differentiate the following and give examples of each
(a)Innate and acquired immunity
(b)Active and passive immunity


Answer
9.

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


Answer
10.

How is a cancerous cell different from a normal cell?


Answer
11.

What are the various routes by which trans-mission of human immunodeficiency virus takes place?


Answer
12.

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


Answer
13.

The following are some well-known abbreviations, which have been used in this chapter. Expand each one to its fall form:
(a)MALT (b) CMI
(c)AIDS (d)NACO
(e)HIV


Answer
14.

Draw a well-labelled diagram of an antibody


Answer
15.

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


Answer
16.

Hovy does the transmission of each of the following diseases take place?
(a)Amoebiasis (b) Malaria
(c)Ascariasis (d) Pneumonia


Answer
17.

What are the various public health measures, which you would suggest as safeguard against infectious diseases?
 


Answer
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