Class 12
Genetics & Evolution
Trace information from DNA to traits, then connect inherited variation with evolution. Build crosses step by step, and use probabilities rather than memorised ratios alone.
6 published MCQs
Read Chapter ↗BIOLOGY CHAPTERS & MCQ PRACTICE
Class 12 biology: turn revision into practice.
Use these published Class 12 chapters to connect your revision with question practice. Each chapter brings its study content and available MCQs together, so you can move between an explanation and the concept behind it.
Start with 10 free MCQs. Register or log in for free to continue. Chapter reading and tutor contact are open without an account.
Available Class 12 Biology chapters
Class 12
Reproduction
Connect gamete formation, fertilisation and development in flowering plants and humans. Keep chromosome number, developmental stages and hormonal control distinct.
6 published MCQs
Read Chapter ↗Class 12
Ecology & Environment
Study the connections between organisms and their environment, from population growth to ecosystem energy flow. Use models carefully and connect conservation to the processes that support biodiversity.
6 published MCQs
Read Chapter ↗Class 12
Biotechnology
Follow a DNA fragment from isolation to a useful product. Learn what each tool does, why each experimental step is needed, and how to interpret common molecular-biology results.
6 published MCQs
Read Chapter ↗How to use these chapters
Choose a topic from your current revision plan. Explain the main idea in your own words, answer its MCQs and check the reasoning. Use your current syllabus and textbook to decide what else you need to cover.
Can I practise biology MCQs for free?
Yes. You can answer 10 questions before creating an account. Free registration unlocks further questions and saves your progress. Explanations appear after you answer when the tutor has provided them.
Where can I ask about a difficult concept?
Connect with Tutor Free by email. Include your class, chapter and question link, and explain what you have tried.
What should I use alongside this practice?
Follow your current syllabus and textbooks. The official NCERT textbook library is a useful source for school biology reading. Concrete Learning provides independent practice and is not affiliated with NTA.