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Biology · PYQ NEET UG 2019(1)

हिन्दी

What triggers activation of protoxin to active Bt toxin of the Bacillus thuringiensis in boll worm?

  1. Alkaline pH of gut
  2. Acidic pH of stomach
  3. Body temperature
  4. Moist surface of midgut

Correct answer · Option 1

Alkaline pH of gut

Explanation

The inactive protoxin crystals dissolve in the alkaline pH of the insect's gut, which is converted to active toxin by gut proteases.

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