Q24 of 30 Page 1

Name the genus to which baculoviruses belong. Describe their role in the integrated pest management programmes.

Nucleopolyhedrovirus is the genus of Baculovirus used in Integrated Pest Management.

Baculoviruses are incorporated in plants via r-DNA technology . They secrete toxins which on ingestion by arthropods or nematods cause adverse effects leading to death of the insect/pest.


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22

(i) Name the enzyme that catalyses the transcription of hnRNA.

(ii) Why does the hnRNA need to undergo changes? List the changes hnRNA undergoes and where in the cell such changes take place.


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(i) Write the scientific names of the two species of filarial worms causing filariasis.

(ii) How do they affect the body of infected person(s)?


(iii) How does the disease spread?


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Unambiguous, universal and degenerate are some of the terms used for the genetic code. Explain the salient features of each one of them.

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Water is very essential for life. Write any three features both for plants and animals which enable them to survive in water scarce environment.

OR


How do organisms cope with stressful external environmental conditions which are localised or of short duration?