Biotechnology and its Applications · Class 12 · CBSE · Science Biology
A plant is engineered to produce double-stranded RNA complementary to an essential gene of the root-knot nematode Meloidogyne incognita. How does thi…
Practice question from Biotechnology and its Applications (Class 12 · CBSE · Science Biology), with the correct answer and a step-by-step solution.
hard · MCQ · Q-DFA29C
A plant is engineered to produce double-stranded RNA complementary to an essential gene of the root-knot nematode Meloidogyne incognita. How does this protect the plant?
- A.The double-stranded RNA is translated into an enzyme that digests the nematode
- B.The double-stranded RNA triggers RNA interference, causing degradation or suppression of the complementary nematode mRNACorrect answer
- C.The double-stranded RNA permanently changes the nematode's DNA sequence
- D.The double-stranded RNA increases production of Bt protoxin in the nematode
Solution
In RNA interference, double-stranded RNA is processed into small interfering RNAs. These guide silencing of complementary mRNA molecules. If the target mRNA is from an essential nematode gene, its suppression prevents normal nematode development and protects the plant.
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