Q1 of 43 Page 1

Biotechnological techniques can help to diagnose the pathogen much before the symptoms of the disease appear in the patient. Suggest any two such techniques.

OR


Mention the form in which inactive protein toxin is produced by Bacillus thuringiensis. How does it get activated in the pest body to kill it?


The two main biotechnological techniques to diagnose the pathogen much before are PCR or polymerase chain reaction and DNA fingerprinting.

OR


The inactive protein toxin produced by Bacillus thuringiensis gets activated when it is ingested by the insect, which in turn destroys the insect’s gut thereby killing it.


More from this chapter

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2

‘Swiss cheese’ is characterised by the presence of large holes. Name the bacterium responsible for it.

 3

What do ‘X’ and ‘Y’ represent in the transcription unit of the DNA molecule shown?


 4

Name the disorder in humans with the following karyotype:

(a) 22 pairs of autosomes + XO


(b) 22 pairs of autosomes + 21st chromosome + XY


 5

If the diploid (2n) number of chromosomes in an angiospermic plant is 16, what will be the number of chromosomes in its endosperm and antipodal cells?

OR


State the reason why pollen grains lose their viability when the tapetum in the anther is malfunctioning.