ISC (Science) ISC Class 12 - CISCE Important Questions

Why are the biocontrol agents preferred over the chemical pesticides?

Why are some molecules called bioactive molecules?

Mention the respective source and state the specific use of any two bioactive molecules.

What does PCR stand for? Describe the different steps of PCR

Give an account of the Blue-White Method of selection of recombinants.

Write a short note on Electrophoresis.

Expand the following abbreviation: BAC

Give one significant difference between:

Electroporation and Gene Gun.

What are the restriction endonucleases? Give the rules of their nomenclature.

Explain the mechanism of action of restriction endonucleases that makes them suitable for genetic engineering.

Explain what are the desirable characteristics of an ideal cloning vector used in rDNA technology.

Describe two vectors less methods of gene transfer used in rDNA technology.

Why are bio-fertilizers preferred over chemical fertilizers?

What is the role of a probe in recombinant DNA technology?

Name and describe the technique that helps in separation of DNA fragments.

Which molecules are called molecular scissors? Why are they called so?

The rDNA technology has provided a method to control the nematode parasite Meloidogyne incognita. Explain the principle involved in this technique.

Name the source of thermostable DNA polymerase.

How many sets of primers are required in each cycle of PCR?

Which one of the following enzymes is used to join DNA fragments?