CBSE 12th Standard Biology Subject Biotechnology and its Applications Value Based Questions 5 Marks Questions 2021
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CBSE 12th Standard Biology Subject Biotechnology and its Applications Value Based Questions 5 Marks Questions 2021
12th Standard CBSE
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Reg.No. :
Biology
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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?(a) -
Monu's uncle is a diabetes patient and id dependent on insulin for diabetes treatment.Monu went to enquire about his health.His uncle told him that diabetes has become a very common problem due to change in life style and a lot of people need insulin for its treatment.Earlier, it was obtained from animals and was short in supply and costly but biotechnology has helped in making it cheaper and easily available.
Read the above passage and answer the following questions:
(i) What precautions will you take to avoid chances of diabetes?
(ii) What is the role of insulin?
(iii) How biotechnology is helpful in increased insulin production to benefit needy people?(a) -
Umesh's grandfather went to village to meet his old friend, after a long time.He found that his friend who once was a big landlord became very poor. Grandfather asked the reason of his poverty in spite of so much land he possessed.He told that his land is suitable for growing cotton and every his crop is devastated by insect attacks and he has been suffering heavy losses.Grandfather consoled him and advised him to grow BT cotton in his fields.
Read the above passage and answer the following questions:
(i) What is BT Cotton?
(ii) How has it been developed?
(iii) How did grandfather help his friend in solving his financial problems?(a) -
Sumit somewhere heard about banana vaccine.To know more about this vaccine, he discussed it with his uncle who was a professor of life sciences.Uncle told him that biotechnology has made possible to deliver vaccine to children through banana.
Read the above passage and answer the following questions:
(i) What is a vaccine?
(ii) What is a banana vaccine? How is it beneficial to children?(a) -
Sakshi's father announced that the children are going to spend this weekend with their grandparents. During the journey Sakshi saw some farmers who were spraying agrochemicals in their field. She requested her father to stop them. Her father praised her and contacted the farmers. He explained the side effects of such agrochemicals. He also suggested them to use biopesticides and bio fertilisers instead of such chemicals. The farmers gave up spraying agrochemicals.
(i) What did Sakshi's father explain to the farmers?
(ii) What are agrochemicals?
(iii) Why are biofertilisers or biopesticides preferred to chemical fertilisers or pesticides?
(iv) What values did Sakshi promote?(a)
5 Marks
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CBSE 12th Standard Biology Subject Biotechnology and its Applications Value Based Questions 5 Marks Questions 2021 Answer Keys
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(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. -
(i) A balanced diet and regular exercise.
(ii) It regulates sugar level in the blood.
(iii) Biotechnology is helpful by producing genetically engineered bacteria which are capable of producing insulin in culture.It will cater to the demand of needy people. -
(i) BT cotton is genetically modified cotton.
(ii) It has been developed by introducing BT toxin gene to the cotton plant from a bacterium which is resistant to bollworms.
(iii) Grandfather was concerned about the well being of his friend and advised him to grow genetically modified, disease resistant variety od frop. -
(i) Vaccines are either attenuated or dead agents of disease which when administered into healthy person, provide immunity against that particular disease.
(ii) Banana vaccine is a transgenic banana having enterotoxin gene from E.coli in their genetic material.Such bananas, as edible vaccines, protect children from diarrohea. -
(i) Sakshi's father explained the harmful effects of agrochemicals on the health, environment and the fields.
(ii) Agrochemical is a term used to refer to the various chemical products used in agriculture such as fertilisers, pesticides and herbicides.
(iii) Biofertilisers or biopesticides are preferred because they are cost effective, environment friendly and provide better nourishment to plants.
(iv) Health awareness, ecofriendly nature careful and vigilant attitude.
5 Marks
