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Published on: 25/05/2021
QB365 Provides the updated NCERT Examplar Questions for Class 12 Biology, and also provide the detail solution for each and every ncert examplar questions , QB365 will give all kind of study materials will help to get more marks
Download CBSE Class 12th Standard CBSE Biology question papers, sample papers, important questions, and previous year solved papers in PDF format. Get free study materials, NCERT solutions, and exam preparation resources for Class 12th Standard CBSE Biology
Questions + Answers key
Take MCQ Biology Test1.
In a press note, it was mentioned that Kenya wants a share of the sales of a fabric softener that uses enzymes derived from its lake Bogoria. Since past many generations the people of Kenya, attributed mystical powers to its water.
Scientists found creatures that reside in one of the earth's most inhospitable terrains.
Another country subsequently obtained the water sample of the lake containing the creatures and their enzyme and cloned them on an industrial scale for textile companies and biodetergent manufacturers.
(i) What is your interpretation of the above report?
(iii) What are the values shown by another country?
2.
Prashant's mother is suffering from a disorder for which doctor suggests her to take insulin injections. But his mother declines as she presumes injection are prepared by slaughtering of animals. Doctor smiled and explained him about the genetically engineered human insulin produced these days. He also convinced her to take injections.
(i) Name the bacterium that is used to produce human insulin.
(ii) Name the company that first produced human insulin.
(iii) Name the disease that is treated by using human insulin.
(iv) What values are shown by the doctor?
3.
Anil's grandfather read in the newspaper about golden rice. Being a farmer, he asked Anil to get more information from his teacher about this rice.Teacher explained to him that it is a new variety of rice which in precursor of vitamin A and his will be useful for rice eating poor population.
Read the above passage and answer the following questions:
(i) What is golden rice?
(ii) Why is it beneficial for rice eating poor population?
(iii) What values is displayed by Anil's grandfather?
4.
List the advantages of recombinant insulin.
5.
List the disadvantages of insulin obtained from the pancreas of slaughtered cows and pigs.
1.
(i) It is a case of biopiracy.
(iii) Values shown by another country-unethical behaviour.
2.
(i) E. coli
(ii) Eli Lilly (an American company)
(iii) Diabetes
(iv) The doctor is responsible, caring and honest towards his duty.
3.
(i) Golden rice is variety of rice in which rice grain has a coating of beta carotene, a precursor of vitamin A.
(ii) It is very useful for poor rice eating human population which generally suffers from vitamin A deficiency.
(iii) Being a farmer, Anil's grandfather was concerned about the latest development in agriculture and wanted to grow such varieties which provide better nutrition contents to human beings.
4.
Following are the advantages of recombinant Insulin:
(a) Recombinant Insulin can be prepared on a large scale without worrying about the source animal.
(b) Batch to batch consistency can be maintained, and quality can be maintained.
(c) Helps in preventing cruelty against animals.
(d) Chances of allergic reactions have been minimized.
(e) Chances of transmission of infection from source animals have been nullified.
(f) Recombinant Insulin has almost replaced animal-sourced Insulin from around the world.
(g) This paves the way for forms of Insulin, which need not be given through injections.
5.
1. A slaughtered animal produces very little hormone so that the demand was always higher than the supply.
2. It is unethical to slaughter animals for obtaining the drug.
3. Contamination was quite common
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