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Biotechnology and Its Applications
Question
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A natural form of genetic engineering is exhibited by

  • Haemophilus influenzae

  • E.coli

  • Dolly

  • Agrobacterium tumefaciens

Answer

D.

Agrobacterium tumefaciens

Agrobacterium tumefaciens is known as natural genetic engineer. It is known to infect broad leaved crops such as, tomato, soyabean and tobacco. It causes tumours called crown galls. The tumour formation is induced by its plasmid-Ti. The plasmid integrates a segment of its DNA called T-DNA into chromosomal DNA of its host plant cells. It then causes tumours. i.e., gene transfer occurs without human effort.

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Some More Questions From Biotechnology and Its Applications Chapter

Name two diseases that can be treated by producing biological compound in transgenic animal.

Name the first transgenic cow.

Name the toxin produced by Bacillus thuringiensis.

What is the utility of Bt-Toxin gene ?

Bt-toxin protein exist in which form ?

How is inactive Bt-toxin converted into active form ?

How Bt toxin causes death of insect ?

Name a few forms of cry gene.

List the specific insects killed by (i) cryIAc and (ii) cryIAb.

Name the insect killed by proteins coded by cryIIAb and cry IAc.