As the 2025 AHSEC Class 12 exams approach, every student aims to score well and achieve academic success. Biology is one of the most important subjects for Class 12 students, and knowing the key topics and questions can help students secure a high score. This article outlines the important questions of Biology for the 2025 AHSEC exam, which will guide you in your preparation and boost your chances of success. The questions are prepared based on the latest syllabus and previous exam patterns.
Important Questions of AHSEC Class 12 Biology for 2025 Exam
Miscellaneous Questions
(i) What are prokaryotic cells? Describe their structure. (AHSEC 2014, 2017, 2021)
(ii) What are ribosomes? Write their functions. (AHSEC 2015, 2020)
(iii) What are plasmodesmata? Write their functions. (AHSEC 2016, 2018)
(iv) Describe the fluid mosaic model of plasma membrane. (AHSEC 2013, 2017, 2023)
(v) What are mitochondria? Describe their structure and functions. (AHSEC 2015, 2019)
(vi) What are biomolecules? Describe their types with examples. (AHSEC 2014, 2018)
(vii) What are enzymes? Write the factors affecting enzyme activity. (AHSEC 2015, 2020, 2023)
(viii) What is the primary structure of proteins? Write its importance. (AHSEC 2016, 2021)
(ix) What is mitosis? Describe its stages with diagrams. (AHSEC 2012, 2019, 2024)
(x) What is meiosis? How is it different from mitosis? (AHSEC 2013, 2017, 2023)
(xi) What is the significance of cell division in living organisms? (AHSEC 2015, 2020)
(xii) What is transpiration? Mention its types and significance. (AHSEC 2013, 2017)
(xiii) Describe the mechanism of water transport in plants. (AHSEC 2014, 2018, 2022)
(xiv) What is diffusion? Write its role in the transport of substances in plants. (AHSEC 2016, 2020)
(xv) What is mineral nutrition? Mention essential nutrients and their roles in plants. (AHSEC 2014, 2017)
(xvi) What is nitrogen fixation? Describe its importance. (AHSEC 2015, 2020)
(xvii) What are deficiency symptoms of minerals in plants? Explain briefly. (AHSEC 2019, 2023)
(xviii) What is photosynthesis? Describe the light reaction. (AHSEC 2014, 2021)
(xix) What is the Calvin cycle? Explain its stages. (AHSEC 2013, 2017, 2022)
(xx) What are C4 plants? Describe their significance. (AHSEC 2016, 2018, 2020)
(xxi) What is Mendel’s laws of inheritance? Explain with examples. (AHSEC 2014, 2017, 2020)
(xxii) What is incomplete dominance? Explain with an example. (AHSEC 2015, 2019, 2023)
(xxiii) What is co-dominance? Explain with an example. (AHSEC 2016, 2022)
(xxiv) What are sex-linked inheritance and hemophilia? (AHSEC 2013, 2019)
(xxv) What is pedigree analysis? Explain its significance. (AHSEC 2015, 2021)
(xxvi) Differentiate between linkage and crossing over. (AHSEC 2018, 2020)
(xxvii) Describe the structure of DNA as proposed by Watson and Crick. (AHSEC 2014, 2017, 2021)
(xxviii) What is DNA replication? Explain its process with a diagram. (AHSEC 2015, 2019, 2023)
(xxix) What is transcription? Explain its mechanism in prokaryotes. (AHSEC 2013, 2020)
(xxx) What is genetic code? Write its salient features. (AHSEC 2016, 2018, 2022)
(xxxi) What is DNA fingerprinting? Write its applications. (AHSEC 2015, 2019, 2023)
(xxxii) What is organic evolution? Describe the evidences supporting evolution. (AHSEC 2013, 2018, 2022)
(xxxiii) Describe Darwin’s theory of natural selection. (AHSEC 2014, 2020, 2023)
(xxxiv) What is the Hardy-Weinberg principle? Explain its significance. (AHSEC 2015, 2017, 2021)
(xxxv) What is adaptive radiation? Explain with an example. (AHSEC 2016, 2019, 2023)
(xxxvi) What are the factors affecting evolution? (AHSEC 2018, 2020)
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Why Focus on Important Questions?
Focusing on important questions allows students to prioritize their study efforts. By practicing these questions, students can:
- Understand the exam pattern and the type of questions asked.
- Identify key concepts that are frequently tested.
- Boost their confidence by revising the most significant topics before the exam.
- Save time by narrowing down their focus.
How to Use This List of Important Questions
To maximize your success, follow this strategy while preparing for your Biology exam:
- Revise all the concepts related to the important questions mentioned below.
- Practice answering these questions under exam conditions to improve speed and accuracy.
- Link these questions with related diagrams, as drawing accurate diagrams can fetch extra marks.
- Make short notes for each important question and revise them regularly.
Conclusion
Preparing for the AHSEC Class 12 Biology exam can be challenging, but by focusing on the important questions and following a structured study approach, you can achieve your desired results. Remember to stay consistent, practice regularly, and maintain a positive attitude throughout your preparation. Best of luck in your 2025 exams!