MCQ
Pyrethrin is extracted from:
- AAzadirachta indica
- BHelianthus annus
- CP. indica
- DChrysanthemum cinerarifolium
Explanation:
Pyrethrum is the powdered, dried flower head of Chrysanthemum cinerarifolium. The term pyrethrins refer to the six related insecticidal compounds that occur naturally in the crude material. These compounds have potential insecticidal activity. These compounds are a part of insect repellants such as coils, sprays, etc.
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$(i)$ $RNA$ can directly code for the synthesis of proteins
$(ii)$ It is very common process to synthesis $DNA$ from $RNA$
$(iii)$ $RNA$ is used as genetic material only in human
$(iv)$ One polynucleotide chain is present in $RNA$