Science (English Medium) इयत्ता १२ - CBSE Important Questions for Biology

Why do children cured by enzyme-replacement therapy adenosine deaminase deficiency need periodic treatment?

Write the function of adenosine deaminase enzyme.

Expand the Given and mention one application of each:

PCR

Why a transgenic animals so called?

Explain the role of transgenic animals in (i) Vaccine safety and (ii) Biological products with the help of an example each.

Suggest any two possible treatments that can be given to a patient exhibiting adenosine deaminase deficiency.

State the cause of ADA deficiency in humans.Mention a possible cure for an ADA deficiency patient.

Expand the Given and mention one application of each:

ELISA

What is gene therapy? Name the first clinical case in which it was used.

Why does Bt toxin not kill the bacterium that produces it, but kill the insect that ingests it?

Give a schematic representation of the transformation of a pro-insulin into insulin.

Write any two biochemical/molecular diagonostic procedures for early detection of viral infection. Explain the principle of any one of them.

Describe the steps that are followed during secondary treatment of sewage.

Answer the following question.
Describe the roles of heat, primers, and the bacterium Thermus aquaticus in the process of PCR.

Answer the following question.
Explain the various steps involved in the production of artificial insulin.

"Artificial insemination helps overcome several problems of normal mating in cattle". Do you agree? Support your answer with any three reasons.

Describe the role of high temperature.

Describe the role of primers.

Describe the role of bacterium Thermus aquaticus in carrying the process of polymerase chain reaction.

A patient admitted in ICU was diagnosed to have suffered from myocardial infarction. The condition of coronary artery is depicted in the image below.

Name two bioactive agents and their mode of action that can improve this condition.