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CBSE Class 12 Biology: Important Topics and Tips for Finals
Meritnation|Feb 19th, 2016 05:01pm
Students your final exams are just around the corner. Students are busy with their last minute revisions and trying to get the most out of their study hours these days.
But you do not need to panic as out the team of experts at Meritnation has come up with some great insights into each chapter for your Biology exam. These key revision points and quick tips will help you prepare intelligently for the exams. Even if you have left out certain chapters for last minute preparations or revisions, these tips will help you get through them better.
RECOMMENDED RESOURCES: Revision Notes | Sample Papers | Textbook Solutions | Ask & Answer
Unit: Reproduction
Chapter 1 – Reproduction in Organisms
Important Topics:
1. Modes of asexual reproduction
Chapter 2 – Sexual Reproduction in Flowering Plants
Important Topics:
1. Pre-fertilisation Events
2. Inbreeding depression
3. Double fertilisation
Chapter 3 – Human Reproduction
Important Topics:
1. Gametogenesis, Fertilisation and Events of Pregnancy
Chapter 4 – Reproductive Health
Important Topics:
1. Birth control methods
2. Sexually transmitted diseases
3. Techniques to treat infertility
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MERITNATION TIPS: a) The unit reproduction is thoroughly covered previously in class 10. The basics of the unit are same but certain sections are provided in detail. b) While preparing for your exams you must focus on the reproduction of flowers. The definition of double fertilization with mechanism is frequently asked in exams. c) If we talk about human reproduction, the process of reproduction with means of birth control and sexually transmitted diseases should not be missed. |
Unit: Genetics and Evolution
Chapter 5 – Principles of Inheritance and Variation
Important Topics:
1. Mendel’s Laws
2. Post-Mendelian Genetics
3. Chromosomal Disorders and Pedigree analysis
Chapter 6 – Molecular Basis of Inheritance
Important Topics:
1. Structure of DNA
2. Experiments of F. Griffith, Hershey & Chase and Meselson & Stahl
3. Mechanism- replication, transcription and translation
4. Salient features of genetic code
5. lac operon
Chapter 7 – Evolution
Important Topics:
1. Homologous and analogous organs
2. Adaptive radiation
3. Hardy-Weinberg principle
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MERITNATION TIPS: a) This is one of the most important units in the syllabus. While preparing for the exam you must have complete idea about Mendel and its crosses, post Mendelian genetics, chromosomal disorders and some idea about pedigree. b) The molecular basis of inheritance includes important topics of structure of DNA and all the experiments related to that, genetic code on Operon theory is also very important. c) From evolution point of view the difference between analogous and homologous organs, Hardy-Weinberg principle and adaptive radiation are important. |
RECOMMENDED RESOURCES: Revision Notes | Sample Papers | Textbook Solutions | Ask & Answer
Unit: Biology in Human Welfare
Chapter 8 – Human Health and Disease
Important Topics:
1. Life cycle of Plasmodium
2. Causative agents of different diseases and their mode of transmission
3. Difference between innate and adaptive immunity
4. AIDS and Drug Abuse
Chapter 9 – Strategies for Enhancement in Food Production
Important Topics:
1. Inbreeding and outbreeding
2. Single cell protein
Chapter 10 – Microbes in Human Welfare
Important Topics:
1. Microbes and their products
2. Sewage treatment
3. Biogas production
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MERITNATION TIPS: a) This unit is very much associated with the role that biology can play in human development and welfare. b) It focuses on different areas at the same time, so one have wide outlook to understand the motive of these chapters. c) From exam point of view one must have the idea about difference between innate and adaptive immunity, AIDS (its causes and treatment including the structure of AIDS virus) d) Some of the most frequently asked questions from this unit include the topics like sewage and its treatment and biogas production plant. |
Unit: Biotechnology
Chapter 11 – Biotechnology: Principles and Processes
Important Topics:
1. Restriction enzymes
2. Cloning vectors
3. Transformation processes
Chapter 12 – Biotechnology and Its Applications
Important Topics:
1. Bt cotton
2. RNA interference
3. Gene therapy
4. Genetically engineered insulin
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MERITNATION TIPS: a) This unit is very much application based and the questions asked are either short answer type questions or sometimes long answer type questions. b) The important topics include cloning vectors, Bt cotton, PCR technology, restriction enzymes. c) This unit is also important from entrance exam point of view, so it can be studied in detail for further benefit but if you want to focus primarily on board exams then you must study the selective topics. |
Unit: Ecology and Environment
Chapter 13 – Organisms and Population
Important Topics:
1. Population interactions
Chapter 14 – Ecosystem
Important Topics:
1. Pyramids of number, energy and biomass
2. Nutrient cycling
3. Ecological Succession
Chapter 15 – Biodiversity and Conservation
Important Topics:
1. Causes of biodiversity losses
Chapter 16 – Environmental Issues
Important Topics:
1. Air pollution
2. Eutrophication and Biomagnification
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MERITNATION TIPS: a) This chapter is easy to understand and equally important to score good marks. b) The topics in focus before exams must include: population interaction and various pyramids, Nutrient cycling, Ecological succession and air pollution. These topics are asked in short or long answer type questions. c) Eutrophication and biological magnification are topics that are mostly asked for definition. |
RECOMMENDED RESOURCES: Revision Notes | Sample Papers | Textbook Solutions | Ask & Answer
All the best with your final exams!
Please take a moment to spread these tips with your friends. After all, Knowledge is the only thing that grows when shared! 🙂
Add Comment Total Comments (8)
1. Choti | July 18th, 2019 at 10:20 pm
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2. saru | February 25th, 2019 at 9:34 am
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5. arpita | April 2nd, 2017 at 10:30 pm
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6. Vani | March 7th, 2017 at 7:47 pm
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7. Rishab | January 13th, 2017 at 10:27 am
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8. Sunny | April 12th, 2016 at 6:29 am
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