CBSE Class 12 Biology Important 5 Marks Questions for Last Minute Revision Before Term 2 Exam 2022

CBSE Class 12 Biology students can check the long answer questions to practice for last minute revision before the upcoming Term 2 exam 2022. These questions are created by subject experts on the basis of important concepts.

CBSE Class 12 Biology important long answer type questions are given below to help students prepare for the upcoming CBSE Class 12 Biology Term 2 Exam 2022. These questions are completely based on Class 12 Biology Term 2 syllabus. All questions are suggested by experienced teachers for last minute revision before the exam. Hence, students are advised to practice all the below given 5 marks questions to prepare well for the exam and score maximum marks. Check the chapter-wise questions below.

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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 5 Marks Questions (Chapter-Wise)

Chapter 8 – Human Health and Disease

1. Describe the lymphoid organs of the body and their role.

2. Find out the events that occur in the human body which lead to immunodeficiency when HIV enters the body.

3. What is the basic principle of vaccination? How do vaccines prevent microbial infection?

(b) Name the organism from which the hepatitis B vaccine is made.

(c) difference between B-cells and T-cells

4. What are the methods of cancer detection? Describe the common methods of cancer treatment?

5. Mention one application for each of the following

a) passive immunization

b) antihistamine

c) Colostrum

d) cytokine inhibition

e) ELISA

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

Chapter 10 – Microorganisms in Human Welfare

1. Explain the various steps involved during the first treatment stage of sewage.

2. Secondary treatment of sewage is also called ‘biological treatment’. Justify the statement and explain the process.

3. Describe how ‘flox’ and ‘active sludge’ help in sewage treatment.

4. Answer Briefly

(a) How is sewage harmful to human beings?

(b) What is organic farming?

(c) Which group of organisms attack insects and arthropods? How are they the best biocontrol biological agents?

(d) What is the difference between phlox and primary sludge?

(e) What is metagenomics?

8. Write a short note on

(a) baker’s yeast

(b) alcohol

(c) statins

(d) brewer’s yeast

(e) streptokinase

Chapter 11 – Biotechnology – Principles and Processes

1. Any recombinant DNA with the desired gene in billion copies is required for commercial use. How is amplification done? Explain

2. How is Thermus aquaticus bacterium employed in recombinant DNA technology?

3. What is a Bioreactor? Draw a labeled diagram of a rare stirred bioreactor. Explain its working.

4. Describe the parts of a simple stirred-tank bioreactor.

5. Draw labeled diagrams of simple stirred tank bioreactor and spurged stirred tank bioreactor. Differentiate between simple stirred tank bioreactor and spurred stirred tank bioreactor.

Chapter 12 – Biotechnology and its Applications

1. What is Gene Therapy? Illustrate using an example of adenosine deaminase (ADA) deficiency.

2. Graphically represent the experimental steps in cloning and expressing a human gene (such as the gene for growth hormone) into a bacterium.

3. List five recombinant proteins used in medicine. Find out where they are used as therapeutics.

4.(i) What is a plasmid?

(ii) Plasmids are a boon for biotechnology. Justify this statement using the production of human insulin as an example.

5.(i) How is mature insulin different from the insulin secreted by the pancreas in humans?

(ii) Why is the functional insulin thus produced considered superior to the insulin used earlier by diabetic patients?

(iii) Describe the responsibility of the GEAC set up by the Government of India.

Chapter 13 – Organisms and Populations

1.(a) What is an age-pyramid?

(b) Name three representative types of age-pyramids for the human population and list the characteristics for each of them.

2.(a) Following are the reactions of different animals to different abiotic factors. Describe each with the help of example.

(i) Regulated

(ii) analogous

(iii) migrate

(iv) suspended

(b) If 8 individuals die in a population of 80 butterflies in a week, calculate the mortality rate of that population of butterflies during that period.

3.(a) The graph given below shows the response of organisms to temperature as an environmental condition.

(i) Which one of the two lines represents the conformity and why?

(ii) What does the second line represent in the graph and why?

(b) Parasites have noted various adaptations in their hosts to be able to complete their life cycle successfully.

Chapter 15 – Biodiversity and its Conservation

1.(a) Why should we conserve biodiversity? how can we do it?

(b) Explain the importance of biodiversity hot-spots and sacred groves.

2. Study the graphical representation of the species richness-area relationship given below:

cbse class12 biology 5marks questions term2 image2

a) What do S, A, C and Z represent in the graph?

b) If we analyze the species area relationship for very large areas like an entire continent, then what will be the range value of ‘Z line’.

3. What is the difference between the basic approaches towards in situ and outer space conservation. Explain with example.

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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