Molecular Basis of Inheritance
CBSE · Class 12 · Biology
Step-by-step guide to study Molecular Basis of Inheritance in CBSE Class 12 Biology. Topics to cover, practice strategy, and time allocation.
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Learn the Theory
Read the textbook chapter carefully. Note down definitions, formulas, and key concepts.
Practice Problems
Solve textbook exercises and additional practice questions. There are 44 questions available for this chapter.
Revise & Test
Revise key formulas and concepts without looking at notes. Take a practice quiz to test your understanding. Mark weak areas for re-revision.
Spaced Revision
Revisit Molecular Basis of Inheritance after a week. Use flashcards for quick recall. Solve previous year questions from this chapter.
What to Focus On
- DNA is the genetic material in most organisms.
- Adenine pairs with thymine and guanine pairs with cytosine.
- DNA strands are antiparallel.
- Griffith discovered a transforming principle.
- Avery, MacLeod, and McCarty showed the transforming principle was DNA.
- Hershey and Chase proved DNA enters bacteria during phage infection.
- DNA is more stable than RNA.
- RNA is the first genetic material.
- RNA acts as genetic material in some viruses.
Common Mistakes to Avoid
DNA and RNA are basically the same molecule, so either one can serve the same role in all organisms.
The coding strand is the strand that RNA polymerase reads during transcription.
DNA polymerase can start replication on its own and can work in both 5'→3' and 3'→5' directions.
Memory Tips
DNA and RNA roles
Purines and pyrimidines
DNA base pairing and hydrogen bonds
Double helix features
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Sources & Official References
- NCERT Official — ncert.nic.in
- CBSE Academic — cbseacademic.nic.in
- CBSE Official — cbse.gov.in
- National Education Policy 2020 — education.gov.in
Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.
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