The GATE Grind

GATE 2019 BT – Question 11

Recombinant DNA Technology and Other Tools in Biotechnology · Recombinant DNA technology: Restriction and modification enzymes, vectors, expression vectors, libraries, gene isolation and cloning, transposons, gene targeting · 1 mark · Multiple choice

The Bt-toxin gene from Bacillus thuringiensis used to generate genetically modified crops is

  1. cry
  2. cro
  3. cdc
  4. cre

Practise this question in The GATE Grind →

Show answer and explanation

Correct answer: (A) cry

Explanation

The cry genes encode insecticidal crystal proteins from Bacillus thuringiensis. Introducing an appropriate cry gene enables a crop to express the corresponding Bt toxin. Thus A. The other names refer to different genetic functions and are not the standard Bt crystal-toxin genes.

More Recombinant DNA technology: Restriction and modification enzymes, vectors, expression vectors, libraries, gene isolation and cloning, transposons, gene targeting questions

All Recombinant DNA technology: Restriction and modification enzymes, vectors, expression vectors, libraries, gene isolation and cloning, transposons, gene targeting questions →