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🔬 Biology  ·  Biotechnology and its Applications  ·  NEET

In the bacterium, the Bt toxin is present in an inactive form called a:

  • A protoxin
  • B antibody
  • C antigen
  • D vitamin

Correct answer: A. protoxin

Explanation: Bt toxin exists as an inactive protoxin crystal in the bacterium.

Concept context

GM crops, transgenic animals, gene therapy, molecular diagnostics, and bioethics. Frequent 2–3 mark questions in NEET.

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