CUET Preparation Today
Match List – I with List – II.
Choose the correct answer from the options given below: |
(A) -(I), (B)-(II), (C)-(IV), (D)-(III) (A)-(III), (B)-(I), (C)-(II), (D)-(V) (A)-(II), (B)-(I), (C)-(IV), (D)-(III) (A)-(III), (B)-(I), (C)-(V), (D)-(II) |
(A)-(III), (B)-(I), (C)-(V), (D)-(II) |
The correct answer is Option (4) → (A)-(III), (B)-(I), (C)-(V), (D)-(II)
Bacillus thuringiensis (Bt) is a bacterium that produces proteins called Bt toxins, which are toxic to certain insects. These toxins have been utilized in biotechnology to create pest-resistant plants, reducing the need for chemical insecticides. One such example is Bt cotton, where the Bt toxin gene is cloned from the bacterium and expressed in the plant. Some strains of Bacillus thuringiensis produce proteins that kill certain insects such as lepidopterans (tobacco budworm, armyworm), coleopterans (beetles) and dipterans (flies, mosquitoes). A nematode Meloidegyne incognitia infects the roots of tobacco plants and causes a great reduction in yield. A novel strategy was adopted to prevent this infestation which was based on the process of RNA interference (RNAi). |
