Statement I : A crop expressing a cry gene is usually resistant to a group of insects.\ Statement I

Question

Statement I : A crop expressing a cry gene is usually resistant to a group of insects.\ Statement II : Cry proteins produced from Bacillus thuringiensis are toxic to larvae of certain insects.\

Professor PC Thomas Classes · Answer

(a) : Bacillus thuringiensis (Bt), a soil bacterium produces a cry protein (crystal protein). This protein is toxic to the larvae of certain insects. There are several kinds of cry proteins. Each cry protein is toxic to a different group of insects. The gene encoding cry protein, that is cry gene has been isolated and transferred into several crops. A crop expressing a cry gene is usually resistant to the group of insects.