Q20 of 42 Page 1

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

• Nucleopolyhedrovirus is the genus to which Baculoviruses belong.


• The majority of baculoviruses used as biological control agents attack insects and other arthropods.


• These viruses are efficient candidates for species-specific, narrow spectrum insecticidal applications without affecting other non-targeted things (plants, mammals, birds, fish or non-target insects).


• This is required when beneficial insects are being conserved to aid in an overall integrated pest management (IPM) programme.


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18

‘‘A very small sample of tissue or even a drop of blood can help determine paternity.’’ Provide a scientific explanation to substantiate how it is possible.

 19

Explain the phenomena of dominance, multiple allelism and co-dominance taking human ABO blood group as an example.

 21

Give reasons why:

(a) DNA cannot pass into a host cell through the cell membrane.


(b) Proteases are added during isolation of DNA for genetic engineering.


(c) Single cloning site is preferred in a vector.


 22

State the medicinal value and the bioactive molecules produced by Penicilliumnotatum, Monascusperpureus and Trichodermapolysporum.