Previous Year Biology Question Paper for CBSE Class 12 - 2018 - Free PDF Download
Last updated date: 26th Jan 2023
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Biology is a subject that consists of elaborated concepts that need a thorough understanding of all the topics demonstrated with diagrams. By solving question papers of biology Class 12 2018, students will get familiarised with the question pattern, different types of questions asked in the exam and its difficulty level.
Students can decide how much they need to write for a particular question considering their marks allocation. Thus, students can effectively manage their time to solve an examination paper.
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Importance of Solving Sample Paper
Generally, sample papers assist students with different problems they face while writing a paper. It helps students to free themselves from the fear of unknown questions. Students can go through the essential pointers listed below to learn the benefits of solving such question papers:
1. By solving the Biology question paper 2018, students can familiarise themselves better for the exam and get relieved from exam pressure and anxiety.
2. When students practice sample papers based on the actual format of question papers, they bump into different topics and questions asked in previous years’ exams.
3. Students can groom themselves for questions that have been asked often and important questions that carry high marks.
4. To assess preparation for each topic, solving sample papers is the best solution.
Biology Class 12 CBSE Chapters
The overview of the biology Class 12 CBSE chapters is given below:
Chapter 1: Reproduction of Organism
The chapter clears the fundamentals of reproduction in an organism. A brief introduction of both sexual reproduction and asexual reproduction is given. The importance of reproduction and its necessity is explained.
Chapter 2: Reproduction in Flowering plants
Plants reproduce sexually as well as asexually. The chapter throws light on how plants reproduce. From pre-fertilization stages to the formation of seeds and fruits is elaborated.
Chapter 3: Human Reproduction
This chapter is on the human reproductive system. A description of the female and male reproductive systems is given. The anatomy of both the female and male parts is outlined. The stages involved in reproduction are elaborated.
Chapter 4: Reproduction Health
This part of the book is on reproductive health. It is about the significance of a healthy reproductive system. The social effects of population outbursts and ways to stabilize them are given. Brief introductions on sexually transmitted diseases, medical pregnancy termination, and infertility are also given.
Chapter 5: Principles of Inheritance and Variation
This chapter talks about Mendel’s Law of Inheritance. The Law of Dominance and the Law of Segregation are explained. The working of both the laws is demonstrated. Mutations and the hereditary diseases associated with them are also illustrated.
Chapter 6: Molecular Basis Of Inheritance
The chapter starts by introducing the structure and functionality of DNA. It explains the basic units i.e. nucleotides of genetics. The RNA is explained as well as its difference in comparison to DNA is given. Regulation of gene expression is also described.
Chapter 7: Evolution
Darwin’s Theory of Evolution and the timeline of the evolution of the human body is explained. It also covers Hardy-Weinberg’s principle.
Chapter 8: Human Health and Disease
The proper definitions of a healthy and a diseased body are given. The most common human diseases, both infectious and non-infectious are explained. The role of Immunity in the human body is explained.
Chapter 9: Strategies for Enhancement in Food Production
This chapter is on ways we can enhance food production. Animal husbandry is explained as animals are a great source of protein and the milk, milk products, and eggs we get from them are rich in nutrition. Plant breeding, whether it is hybridization or biofortification, all the techniques used to enhance plant production are given. Modern science techniques such as plant tissue culture and single-cell protein production used to enhance food production are described.
Chapter 10: Microbes in Human Welfare
This chapter is on the importance of microbes such as viruses, bacteria, protozoa, algae, and fungi. Bacteria play a role in the formation of milk products, beer, and wine. Whereas some microbes are of good use when it comes to sewage treatment and biogas production.
Chapter 11: Biotechnology Principles and Processes
The principles of Genetic Engineering and Bioprocess Engineering are elaborated in this chapter. DNA cloning and its steps are described.
Chapter 12: Biotechnology and its Application
The uses of biotechnology in agriculture and medicine are discussed. The benefits of biotechnology in organic agriculture and agrochemical agriculture are given. The application of biotechnology in diagnostic medicine such as ELISA and PCR is given. The application in antibiotic production and vaccine production is also elaborated.
Chapter 13: Organisms and Populations
The definition of an organism is briefly discussed. The meaning of population and its attributes is explained. Population growth, population models, and population interactions are discussed.
Chapter 14: Ecosystem
This chapter talks about the biotic and abiotic components of an ecosystem. Both the terrestrial and aquatic ecosystems are explained. The ecological pyramids and the function of the ecosystem are also elaborated.
Chapter 15: Biodiversity and Conservation
This chapter throws light on the meaning of biodiversity and its types. The patterns of biodiversity are discussed. The meaning and importance of biodiversity conservation are given.
Chapter 16: Environmental Issues
The modern-day problems faced by humankind are given in the chapter. It talks about pollution, global warming, depletion of natural resources, deforestation, and environmental issues. This chapter also offers the solutions to these troubles.
Topics of CBSE Biology Question Paper 2018
There are overall 26 questions and five sections in the Class 12 biology question paper 2018. The question paper comprises very short answer type questions, short answer-type questions, value-based questions, and long-answer-type questions. The topics that students need to focus on while solving sample papers are provided below:
1. Genetics and Evolution - 18 marks.
2. Biotechnology and its Applications - 10 marks.
3. Biology and Human Welfare - 14 marks.
4. Reproduction - 14 marks.
5. Ecology and Environment - 14 marks.
The total marks of the CBSE biology question paper 2018 are 70. Sample papers have been designed according to the guidelines provided by the CBSE board.
Important Questions from the Sample Papers
Model question papers allow students to practice the whole syllabus at once and prepare for exams chapter-wise. Students can follow important questions from the question paper of biology Class 12 2018 that are listed below:
1. Though potato is an underground plant part, it is still considered as a stem. Give reasons for your answer.
2. Which part of the gynoecium regulates the suitable nature of pollen?
3. What is the name of the function that cotyledons and nucellus perform?
4. What are the two features of plants that will block insect and pest infestation?
However, students can download CBSE Class 12 biology question paper 2018 solved PDF solved by expert teachers for free, from Vedantu’s official website.
Mock Question Paper of Biology Class 12 - 2018
To prepare for competitive exams, it is essential to give mock tests to help students know about their mistakes. Mock tests are like practice tests that students need to give before appearing for final exams. Below are the benefits of solving mock test papers that include the 2018 biology question paper Class 12:
1. It advises developing the right procedure for writing an exam.
2. It helps you to learn a new approach to find a solution to your problems.
3. It also helps students to understand time management.
4. It assists you in analyzing your own mistakes in different ways and then searching for solutions.
For more queries and doubts, students can register for online classes on the official website of Vedantu where they can engage themselves in online courses regarding important topics.
FAQs on Previous Year Question Paper for CBSE Class 12 Biology - 2018
1. What are the important chapters that students need to study from Biology Class 12?
Students will find important questions from cell biology, reproduction, and genetics. They can get further information on repeated and important questions from previous years’ question paper of Biology Class 12 2018.
2. Write any four reasons for the increasing rate of population in our Country?
The four reasons for the rapid growth of population in our country are, due to improved health services, death rates have been reduced. Also, in rural areas, early marriages are still prevalent. So this is one of the major causes of the growth of population. Moreover, most of our country’s citizens are not educated and do not know the problems that can arise from having a large family. Lastly, life spans have become longer.
3. Explain Test-Tube babies and how they are different from normal babies.
Test tube babies are produced by combining the egg and the sperm in a culture tube (In-vitro Fertilisation) and taking care of the uterus are called test-tube babies. They are just the same as normal babies; only the procedure takes place in In-vitro conditions. Test tube babies don’t grow entirely outside of the body, they just get conceived in a culture tube. When an embryo is formed with the help of a sperm and egg, it is transferred into a woman’s functional uterus where the baby grows.
4. What is Genetic Engineering and what are its benefits?
When two or more different pieces of DNA from different organisms are combined it is known as Genetic Engineering. It is also known as Recombinant DNA technology. Genetic Engineering has many uses in modern science. It is prominently used in medicine and agriculture. The Insulin used today by Diabetic patients is a gift of Recombinant DNA technology. The technology is also used in the production of various vaccines and gene therapies. In agriculture, genetically modified plants are made with the aid of this technology. Diagnostic tests and procedures are sometimes based on genetic engineering. You can go to Vedantu, to learn more about the steps involved in Recombinant DNA technology.
5. How does studying the previous year Biology question paper for CBSE Class 12 - 2018, help students score well in exams?
Studying the Previous Year Biology Question Paper for CBSE Class 12 - 2018, helps students score well in exams in many ways as this method of referring to the sample papers is the most efficient for studying for exams. Going through the Sample papers can help students to understand the paper pattern and get an idea about the type of questions that could be asked in the exam. You can get these sample papers on Vedantu. These sample papers are prepared by the experts in the particular fields and are curated with reference to the previous years’ question papers. You can download this and other material from Vedantufor free.
You can avail all the well-researched and good quality chapters, sample papers, syllabus on various topics from the website of Vedantu and its mobile application available on the play store.