How has the use of Agrobacterium as vectors helped in controlling Meloidogyne incognita infestation in tobacco plants? Explain in the correct sequence.

How has the development of bioreactor helped in biotechnology?

Name the most commonly used bioreactor and describe its working.

Explain the roles of the following with the help of an example each in recombinant DNA technology:

(a) Restriction Enzymes

(b) Plasmids

95.

Which of the following is a restriction endonuclease?

• Protease

• DNase I

• RNase

• RNase

Which of the following is not a feature of the plasmids?

• Circular structure

• Transferable

• Single stranded

• Single stranded

The Taq polymerase enzyme is obtained from

• Thiobacillus ferroxidans

• Bacillus subtilis

• Pseudomonas subtilis

• Pseudomonas subtilis

DNA fragments generated by the restriction endonucleases in a chemical reaction can be separated by

• centrifugation

• polymerase chain reaction

• electrophoresis

• electrophoresis

Which of the following is not correctly matched for the organism and its cell wall degrading enzyme?

• Bacteria -Lysozyme

• Plant cells - Cellulase

• Algae - Methylase

• Algae - Methylase

The colonies of recombinant bacteria appear white in contrast to blue colonies of non-recombinant bacteria because of 

• Non-recombinant bacteria containing  β-galactosidease 

• Insertional inactivation of α - galactosidase in recombinant bacteria

• Insertional inactivation of α-galactosidase in recombinant bacteria

• Insertional inactivation of α-galactosidase in recombinant bacteria