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All India - 2015
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Q2 of 40 Page 1

What is a cistron?

The section of DNA which contains genetic code for a single polypeptide and functions as a hereditary unit is called cistron.


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1

How many chromosomes do drones of honeybee possess? Name the type of cell division involved in the production of sperms by them.

3

Retroviruses have no DNA. However, the DNA of the infected host cell does possess viral DNA. How is it possible?

4

Why do children cured by enzyme-replacement therapy for adenosine deaminase deficiency need periodic treatment?

5

List two advantages of the use of unleaded petrol in automobiles as fuel.

Questions · 40
All India - 2015
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