NEET 2008 Biology question

Cry 1 endotoxins obtained from Bacillus thuringiensis are effective against

(1)Boll wormsCorrect
(2)Mosquitoes
(3)Flies
(4)Nematodes

Answer: (1)

Solution

The Bt toxin genes cryIAc and cryIIAb code for crystal proteins (Cry toxins) that control cotton bollworms; the Cry I group is active against lepidopteran pests (boll worms, corn borer). Hence option (1). Other Cry proteins act on

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Question ID VK-090125