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Which of the following statements (i - v) is/are incorrect ?
(i) Recombinant DNA technology is used to improve crop plants by increasing their productivity, by making them more nutritious and by developing disease resistant.
(ii) Bt cotton is resistant to bollworm infestation.
(iii) Bacillus thuringiensis can form cry protein during any phase of their growth.
(iv) Bacillus thuringiensis is not harmed by self cry protein because of its occurrence as protoxin (inactive).
(v) Protoxin cry protein is changed into active cry protein in the stomach of insects due to alkaline pH in stomach.

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