Given below are two statements: In the light of the above statements, choose the correct answer from the options given below:
- Both Statement I and Statement II are true
- Both Statement I and Statement II are false
- Statement I is true but Statement II is false
- Statement I is false but Statement II is true
Answer
(3) Statement I is true but Statement II is false
Solution
Statement I: Bt toxin proteins are insect-group specific and are coded by cry genes; the protein of gene cry IAc controls cotton bollworms. Hence Statement I is true.
Statement II: Bt toxin exists as an inactive protoxin in B. thuringiensis, but it becomes active in the insect gut because of the alkaline pH (not acidic pH), which solubilises the crystals. Hence Statement II is false.
Answer: (3)