CBSE Class 12 Biotechnology — Important Questions 2026
Most important questions for CBSE Class 12 Biotechnology board exam 2026. Chapter-wise questions with marking scheme and expected topics.
Quick Summary
This page covers the most important questions for CBSE Class 12 Biotechnology board exam 2026, based on previous year question papers and expected topics. Focus on these for maximum marks.
How to Use Important Questions
- Start with high-weightage chapters — focus on chapters that carry the most marks in the exam.
- Practice writing answers — don't just read; write out answers within the time limit to build speed.
- Cross-reference with syllabus — ensure every chapter is covered by checking the syllabus page.
- Revise with notes — after practising, use revision notes for quick recap before the exam.
Chapter-Wise Important Questions — 13 Chapters
Focus on high-weightage chapters first. Each chapter below lists the types of questions frequently asked in CBSE board exams.
An Overview of Recombinant DNA Technology
64 questionsWhich scientists discovered plasmids in 1952?
Which structure of DNA was proposed in 1953?
Which enzyme acts as scissors to cut molecules of DNA?
Which enzyme joins two DNA fragments?
+60 more questions — practice in Super Tutor
Host–Vector System
64 questionsWhat is an episome?
Which plasmid category provides drug resistance by encoding enzymes that deactivate antibiotics?
Which plasmid category produces colicins that kill other bacteria?
Which plasmid category contains transfer genes for pilus formation and plasmid transfer?
+60 more questions — practice in Super Tutor
Gene Cloning
72 questionsWhat is the role of reverse transcriptase in cDNA preparation?
Which molecule is used to break the peptidoglycan of bacterial cell walls during DNA isolation?
Which detergent is used for bacterial cell lysis by disrupting the lipid bilayer?
What type of detergent is CTAB?
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10 more chapters available
Get chapter-wise important questions with practice tests for all 13 chapters
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Try Super Tutor — It's FreeFrequently Asked Questions
Where can I find CBSE Class 12 Biotechnology Important Questions?
This page provides important questions for CBSE Class 12 Biotechnology for the 2026 board exam. For chapter-by-chapter study help including summaries, quizzes, and flashcards, try Super Tutor.
Is CBSE Class 12 Biotechnology easy to score in?
Biotechnology is one of the scoring subjects in CBSE Class 12 if prepared well. Focus on understanding concepts, practising problems regularly, and revising key formulas. Most students who follow a structured study plan score above 80%.
How to prepare for CBSE Class 12 Biotechnology board exam?
Start by understanding the complete syllabus. Then focus on important questions from each chapter. Use revision notes for quick review before exams. Follow a study plan that covers all chapters with dedicated revision time.
How many questions come from each chapter in CBSE Class 12 Biotechnology?
The question paper distribution varies each year, but certain chapters consistently carry more marks. Check the marks distribution section above for chapter-wise weightage based on previous year patterns.
Browse Important Questions by Chapter
13 chapters available
An Overview of Recombinant DNA Technology
Host–Vector System
Gene Cloning
Applications of Recombinant DNA Technology
Genome Technology and Engineering
Microbial Culture
Plant Tissue Culture
Animal Cell Culture
Stem Cell Culture and Organ Culture
Bioprocessing and Biomanufacturing
Bioremediation
Recent Innovations in Biotechnology
Entrepreneurship
More Biotechnology Resources
CBSE Class 12
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