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प्रश्न
Silencing of a gene could be achieved through the use of ______.
पर्याय
RNAi only
antisense RNA only
both RNAi and antisense RNA
none of the above
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उत्तर
Silencing of a gene could be achieved through the use of both RNAi and antisense RNA.
Explanation:
Gene silencing can be achieved through RNA interference (RNAi) as well as antisense RNA. RNAi works by introducing double-stranded RNA that matches the target genes mRNA, leading to degradation of the mRNA and inhibition of translation. Similarly, antisense RNA binds to complementary mRNA sequences to block their translation. Thus, both mechanisms can be used effectively for gene silencing.
संबंधित प्रश्न
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Bt cotton is not ______.
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Insects in the Lepidopteran group lay eggs on maize crops. The larvae on hatching feed on maize leaf and tender cob. In order to arrest the spread of three such Lepidopteran pests, Bt maize crops were introduced in an experimental field.
A study was carried out to see which of the three species of lepidopteran pests was most susceptible to Bt genes and its product.
The lepidopteran pests were allowed to feed on the same Bt-maize crops grown on 5 fields (A-E).
The graph below shows the leaf area damaged by these three pests after feeding on maize leaves for five days.
Key for lepidopteran insect pest species
 |
Species I |
 |
Species II |
 |
Species III |
Insect gut pH was recorded as 10, 8 and 6 respectively for Species I, II and III respectively.
(a) Evaluate the efficacy of the Bt crop on the feeding habits of the three species of stem borer and suggest which species is least susceptible to Bt toxin.
(b) Which species is most susceptible to Bt-maize, and explain why?
(c) Using the given information, suggest why a similar effect was not seen in the three insect species.
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