The cutting of DNA at specific locations became possible with the discovery of?

1. Restriction enzymes

2. Probes

3. Selectable markets

4. ligases

The introduction of t-DNA into plants involves?

1. Infection of the plant by Agrobacterium tumefaciens

2. Altering the pH of the soil, heat-shocking the plants

3. Exposing the plants to Cold for a brief period

4. Allowing the plant roots to stand in water

Which vector can clone only a small fragment of DNA?

1. Bacterial artificial chromosome

2. Yeast artificial chromosome

3. Plasmid

4. Cosmid

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

1. Plant cells- cellulose

2. Algae - Methylase

3. Fungi - Chitinase

4. Bacteria - Lysozyme

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

1. Polymerase chain reaction

2. Electrophoresis

3. Restriction mapping

4. Centrifugation

The colonies of recombinant bacteria appear white because of:

The figure below is the diagrammatic representation of the E.coli vector pBR 322. Which one of the given options correctly identifies its certain components (s)? 
 
1. Ori-original restriction enzyme

2. Rop-reduced osmotic pressure

3. Hind III, Eco RI-selectable markers

4. Amp^R, teti^R-antibiotic resistance genes

Which one of the following is a case of wrong matching?

Which one is a true statement regarding DNA polymerase used in PCR?

1. It is used to ligate introduces DNA in recipient cells

2. It serves as a selectable marker

3. It is isolated from a virus

4. It remains active at high temperatures

For transformation, microparticles coated with DNA to be bombarded with gene gun are made up of:

1. Silver or platinum

2. Platinum or zinc

3. Silicon or platinum

4. Gold or tungsten