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Biotechnology And Its Applications

Question
CBSEENBI12046964

Which one of the following is a correct statement?

  • "Bt" in "Bt-cotton" indicates that it is a genetically modified organism produced through biotechnology

  • Somatic hybridization involves fusion of two complete plant cells carrying desired genes.

  • The anticoagulant hirudin is being produced from transgenic Brassica napus seeds.

  • "Flavr Savr" variety of tomato has enhanced the production of ethylene which improves its taste.

Solution

A.

"Bt" in "Bt-cotton" indicates that it is a genetically modified organism produced through biotechnology

Bt in Bt Cotton means Bacillus thuringiensis. It is a naturally occuring soil bacterium. 

Somatic hybridization involves the fusion of protoplast of two cells.

Flavr Savr is genetically engineered tomotoes. They express delayed softening by insertion of an additional copy of PG endoiciding gene. PG or Poly Galactouronase enzyme is responsible for the breakdown of cell wall pectin.

Transgenic Brassica napus seeds are used to produce the anticoagulant hirudin.