Practice Important 3 Marks Questions to crack Term 2 Test

For the CBSE Class 12 Biology Term 2 exam to be held on May 30, 2022, we have provided here important 3 marks questions prepared by experts. Practice these chapter-wise questions for last minute revision and score high in the exam.

CBSE Class 12 Biology students will appear for Biology Term 2 board exam on 30 May (Monday). To help them prepare well for the exam and revise the important concepts, we have given below the important 3 marks questions. These important questions have been set by experts. Check chapter-wise questions and practice them all to score perfect marks in your CBSE Class 12 Biology Term 2 Exam 2022.

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CBSE class 12 biology solved practice paper by experts for last minute revision before term 2 exam

CBSE Class 12 Biology Sample Paper Term 2 Board Exam 2022. by experts for

Check CBSE Class 12 Biology Important 2 Marks Questions (Chapter-Wise)

Chapter 8 – Human Health and Disease

Q. Name the disease in which the immune system of a person gets suppressed. Name the causative organism and diagnostic technique of this disease.

QA Farmer was bitten by a poisonous snake while working in his field. The laborers present in the field immediately took him to the nearby health center. The doctor immediately gave an injection to save his life. What injection did the doctor give and why? Explain

Qa) It is generally observed that children who were suffering from smallpox in childhood may not develop the same disease in adulthood. Explain giving reasons for such immunity in a person. Name the type of immunity.

b) What is interferon? Mention their role.

QA). Why are there fears among parents that their teenage children may be involved in drug/alcohol abuse?

b) Explain addiction and dependence in relation to drug/alcohol abuse among youth.

Q. How does HIV break down the immune system of AIDS patients?

CBSE Class 12 Biology Sample Paper and Marking Scheme for Term 2 Exam 2022 (by CBSE Board)

Chapter 10 – Microorganisms in Human Welfare

Q. Some fungi form symbiotic relationships with the roots of higher plants and both the partners benefit from this association. How is this association beneficial to plants?

Q. Instead of pesticides, organic farmers have started using microbes to control pests. Name a bacterium and a virus which are used as biocontrol agents. How is this method better than pesticide based farming?

Q. The members of a school’s eco club have donated a portable biogas plant to their school for the management of lunch waste. For the production of biogas, initially it is necessary to add cow dung to the biogas plant.

a. What is the purpose of mixing cow dung in a biogas plant?

b. Name any three components of biogas.

c. How is the spent solution useful?

QA) What is activated sludge at STP?

b) Explain the fate of sputum active in Apak Pachak.

Q. How are the following microorganisms useful to us?

a) Trichoderma polysporum

b) Monascus purpureus

c) Penicillium notatum.

Chapter 11 – Biotechnology – Principles and Processes

Q. With the help of diagram show the different steps in the formation of recombinant DNA by the action of restriction endonuclease.

Q:How are restriction endonuclease enzymes named? Write an example.

Q. How are the separated DNA segments visualized and separated by gel electrophoresis?

Q. 6 List the recombinant proteins that are used in medicine? Find out where they are used as therapeutics.

Q. Draw two types of bioreactors. What is utility? Which is the common type of bioreactor?

Chapter 12 – Biotechnology and its Applications

Q. What are transgenic animals? How was the first transgenic cow found to be more useful for humans than the normal cow?

Q. How parasitic infection can be prevented by silencing specific mRNA in RNA interference?

Q. What causes adenosine deaminase deficiency in a person?

Q.GMOs have been useful for mankind. List five useful GMOs created so far and how they have been useful.

Q. Suggest any two possible treatments to be given to a patient with adenosine deaminase deficiency.

Chapter 13 – Organisms and Populations

Q.(a) Explain any two defense mechanisms developed by plants against their predators.

(b) How is a predator different from a parasite?

Q. On a trip to a hill station, one of your friends suddenly became unwell and started feeling restless.

(a) List two symptoms that you would notice if caused by allergies.

(b) Explain the body’s response to an allergen.

(c) Name two medicines which can be recommended for immediate relief

Q.(a) “Organisms can be conformers or regulators.” Explain this statement and give one example each.

(b) Why are there more analogies than regulators in the animal world?

Q. Different animals react in different ways to changes in their environment. Taking one example of each, explain that “some animals undergo aestivation while others undergo hibernation”. How do fungi respond to adverse climatic conditions (3)

Q.(a) Compare the J-shaped and S-shaped models of population growth of a species, giving reasons.

(b) Explain the ‘fitness of a species’ as described by Darwin.

Chapter 15 – Biodiversity and its Conservation

Q. Explain how ex-situ conservation helps in protecting biodiversity.

Q. Represent the biodiversity of more than a thousand varieties of mangoes in India. How is this possible?

Q. Co-extinction and introduction of alien species are also responsible for the loss of biodiversity. explain how.

Q. Name and describe any three causes of loss of biodiversity.

Q. Narrow utilitarian arguments are presented in support of biodiversity conservation.

Read also:

CBSE Class 12 Biology Syllabus for Term 2 Exam 2022 with Important Revision Resources

CBSE Class 12 Biology NCERT Solutions

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