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| Classwise Science MCQ Questions with Solutions (Class 12th) | ||||||||||||||
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Class 12th Biology MCQ Questions
1. Reproduction In Organisms
This chapter provides a foundational overview of reproduction, contrasting the two primary modes: asexual reproduction (e.g., budding, fission) and sexual reproduction (involving gamete fusion). To test your understanding of these basic life processes, this section provides a set of Multiple-Choice Questions (MCQs) covering the key concepts and examples from the chapter.
2. Sexual Reproduction In Flowering Plants
This chapter offers an in-depth look at sexual reproduction in angiosperms, detailing the structure of the flower, pollination, and the unique process of double fertilisation. Assess your knowledge of plant reproductive biology by solving the MCQs available through the link for this chapter.
3. Human Reproduction
This chapter provides a comprehensive account of human reproduction, detailing the male and female reproductive systems, gametogenesis (spermatogenesis and oogenesis), the menstrual cycle, fertilisation, and pregnancy. Challenge your understanding of human reproductive physiology by attempting the Multiple-Choice Questions provided in this section.
4. Reproductive Health
This chapter addresses the critical issue of reproductive health, discussing family planning, various contraceptive methods, Sexually Transmitted Infections (STIs), and Assisted Reproductive Technologies (ART) like IVF. To help you master these important societal and medical topics, this section offers a range of MCQs for practice.
5. Principles Of Inheritance And Variation
This chapter is the foundation of genetics, explaining heredity through the pioneering work of Gregor Mendel and his Laws of Inheritance. It also covers topics like co-dominance, linkage, and sex determination. Evaluate your ability to solve genetics problems by answering the Multiple-Choice Questions provided for this chapter.
6. Molecular Basis Of Inheritance
This chapter delves into the molecular world of genetics, detailing the structure of DNA and the "Central Dogma" processes: DNA replication, transcription, and translation. It also explains the genetic code and gene regulation (lac operon). Test your understanding of these complex molecular processes by attempting the set of MCQs designed for this chapter.
7. Evolution
This chapter traces the story of life's origin and diversification. It presents evidence for evolution and focuses on Darwin’s theory of Natural Selection as the primary mechanism for evolutionary change. It also covers the Hardy-Weinberg principle and human evolution. Test your knowledge of these evolutionary concepts with the MCQs available for this chapter.
8. Human Health And Diseases
This chapter covers common infectious diseases and provides a detailed account of the human immune system, explaining concepts like innate and acquired immunity and the principle of vaccination. It also discusses cancer and the dangers of drug abuse. Assess your understanding of health and disease by solving the MCQs provided in this section.
9. Strategies For Enhancement In Food Production
This chapter explores scientific methods to increase food production, covering strategies in both animal husbandry and plant breeding. It discusses modern techniques like plant tissue culture, which were central to the Green Revolution. To deepen your understanding of food security strategies, this section provides a range of Multiple-Choice Questions.
10. Microbes In Human Welfare
This chapter highlights the beneficial roles of microorganisms in areas like food production, sewage treatment, and the generation of biogas. It also explains their use as eco-friendly biocontrol agents and biofertilisers. To practice these applications of microbiology, attempt the set of MCQs available through the link for this chapter.
11. Biotechnology : Principles And Processes
This chapter introduces the revolutionary field of biotechnology, focusing on the principles and tools of recombinant DNA (rDNA) technology. It explains the roles of restriction enzymes, cloning vectors, and the Polymerase Chain Reaction (PCR). Reinforce your understanding of these genetic engineering techniques by answering the MCQs linked here.
12. Biotechnology And Its Applications
This chapter demonstrates the practical impact of biotechnology in agriculture (e.g., Bt cotton), medicine (e.g., genetically engineered insulin, gene therapy), and other fields. It also touches upon the critical ethical issues involved. Have fun testing your knowledge of biotech applications with the interactive MCQs provided for this chapter.
13. Organisms And Populations
This chapter marks the beginning of ecology, focusing on organismal adaptations and the dynamics of populations. It explains population attributes and growth models (J-shaped and S-shaped curves) and details various interspecific interactions like predation and mutualism. Challenge yourself with MCQs on population ecology by clicking the link for this chapter.
14. Ecosystem
This chapter examines the ecosystem as the functional unit of nature, focusing on key functions like Productivity, Decomposition, Energy flow (through food chains and governed by the 10% law), and Nutrient cycling. Evaluate your understanding of these ecosystem dynamics by answering the Multiple-Choice Questions provided for this chapter.
15. Biodiversity And Conservation
This chapter highlights the importance of biodiversity and the urgent need for its conservation. It identifies the major threats (the "Evil Quartet") and details the two primary conservation strategies: in-situ (e.g., National Parks) and ex-situ conservation (e.g., zoos). Test your grasp of these critical environmental concepts by solving the MCQs provided for this chapter.
16. Environmental Issues
This chapter addresses major environmental challenges like air and water pollution, waste management, and global issues such as the greenhouse effect, global warming, and ozone layer depletion. Evaluate your understanding of these pressing problems and their potential solutions by attempting the MCQs provided in this section.