Ligase

Q.

Is ligase an enzyme?

Q. Assertion : Flavr Savr tomato is a transgenic tomato that is capable of remaining fresh and retaining the flavour for a longer time.
Reason : In this, production of pectin degrading polygalacturonase is blocked.

1. Both assertion and reason are true and the reason is the correct explanation of the assertion.
2. Both assertion and reason are true and the reason is not the correct explanation of the assertion.
3. Both assertion and reason are false.
4. Assertion is true but reason is false.

Q. The linking of antibiotic resistance gene with the plasmid vector became possible with:

1. DNA polymerase
2. Exonucleases
3. DNA ligase
4. Endonucleases

Q.

How foreign DNA is inserted into a plasmid vector?

Q. Ligase helps in

1. removal of genes
2. translation
3. joining DNA fragments
4. bringing transversion in chromosomes

Q. Assertion : Flavr Savr tomato is a transgenic tomato that is capable of remaining fresh and retaining the flavour for a longer time.
Reason : In this, production of pectin degrading polygalacturonase is blocked.

1. Assertion is true but reason is false.
2. Both assertion and reason are true and the reason is not the correct explanation of the assertion.
3. Both assertion and reason are true and the reason is the correct explanation of the assertion.
4. Both assertion and reason are false.

Q. Blunt ends of passenger and vehicle DNAs are joined by

1. DNA polymerase I
2. RNA polymerase
3. DNA ligase
4. DNA polymerase III

Q. DNA ligase joins 3' end of one DNA strand to the 5' end of another DNA strand.

1. hydroxyl
2. phosphate
3. nitrate
4. lipid