ISC (Science) ISC Class 12 - CISCE Question Bank Solutions for Biology (Theory)

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

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

Name and explain the technique used for separating DNA fragments and making them available for biotechnology experiments.

Write a short note on Electrophoresis.

What is symbiosis?

Explain the term perianth.

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.

Give two differences between heartwood and sapwood.

Why are bio-fertilizers preferred over chemical fertilizers?

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?