Class 12 Biology Chapter 6 – Molecular Basis of Inheritance Study Material PDF Download | English & Tamil Medium | NEET 2027 Preparation | NEET Biology Tamil

Download Class 12 Biology Chapter 6 Molecular Basis of Inheritance Notes PDF in English & Tamil Medium for NEET 2027. NCERT based notes, PYQs, MCQs & solutions.

Introduction

Welcome to NEET Biology Tamil – your free learning platform for NEET, CBSE, and Tamil Nadu State Board Biology preparation.

In this post students can download Class 12 Biology Chapter 6 – Molecular Basis of Inheritance study materials in both English Medium and Tamil Medium.

These materials are useful for NEET 2027 aspirants, CBSE students, and Tamil Nadu State Board students.

📚 Chapter Name

English:
Class 12 Biology Chapter 6: Molecular Basis of Inheritance

Tamil:
வகுப்பு 12 உயிரியல் பாடம் 6 : மரபுரிமையின் மூலக்கூறு அடிப்படை

📌 Available Study Materials

✅ Complete Chapter Notes – English Medium
✅ முழுமையான குறிப்புகள் – தமிழ் வழி
✅ NCERT Based NEET Notes
✅ Important Definitions
✅ Important Diagrams
✅ Important Tables
✅ Mind Maps / Short Notes
✅ Previous Year NEET Questions
✅ Chapter Wise Practice MCQs
✅ Answer Key with Detailed Solutions

About Chapter – Molecular Basis of Inheritance

This chapter explains DNA as the genetic material, its structure, replication, gene expression and regulation. It forms the foundation of modern molecular biology and biotechnology.

Important concepts covered:

🔹 DNA and RNA structure
🔹 DNA as the genetic material
🔹 Griffith's experiment
🔹 Avery, MacLeod & McCarty experiment
🔹 Hershey–Chase experiment
🔹 Watson and Crick DNA model
🔹 DNA replication
🔹 Transcription
🔹 Genetic code
🔹 Translation
🔹 Lac Operon
🔹 Human Genome Project
🔹 DNA Fingerprinting

Important scientists:

🔬 Frederick Griffith
🔬 Avery, MacLeod & McCarty
🔬 Alfred Hershey & Martha Chase
🔬 James Watson & Francis Crick
🔬 Marshall Nirenberg
🔬 Har Gobind Khorana
🔬 François Jacob & Jacques Monod
🔬 Alec Jeffreys

Important examples:

✔ DNA
✔ RNA
✔ mRNA
✔ tRNA
✔ rRNA
✔ DNA Polymerase
✔ Lac Operon
✔ Restriction Enzymes

This is one of the highest-weightage chapters in NEET Biology, with several direct NCERT-based questions every year.

🔥 NEET 2027 Importance of This Chapter

Molecular Basis of Inheritance is among the most important chapters for NEET Biology.

Previous Year NEET Question Trend:

NEET 2022 – 7 Questions

NEET 2023 – 6 Questions

NEET 2024 – 7 Questions

NEET 2025 – 6 Questions

NEET 2026 – 7 Questions

Students should thoroughly revise NCERT diagrams, experiments, genetic code and molecular processes.

⭐ Important NEET 2027 Topics From This Chapter

⭐ Griffith Transformation Experiment
⭐ Avery–MacLeod–McCarty Experiment
⭐ Hershey–Chase Experiment
⭐ DNA Double Helix Model
⭐ Chargaff's Rules
⭐ DNA Replication
⭐ Central Dogma
⭐ Transcription
⭐ Genetic Code
⭐ Translation
⭐ Lac Operon
⭐ Human Genome Project
⭐ DNA Fingerprinting

📥 Download Study Material PDF

📘 Class 12 Biology Chapter 6 Molecular Basis of Inheritance Notes – English Medium PDF

👇 Download Here

📗 வகுப்பு 12 உயிரியல் பாடம் 6 மரபுரிமையின் மூலக்கூறு அடிப்படை குறிப்புகள் – Tamil Medium PDF

👇 Download Here

📝 NEET Previous Year Solved Questions (with Exam Name & Year)

Question 1 (NEET 2026)

Who proposed the double helix model of DNA?

(A) Griffith and Avery

(B) Watson and Crick

(D) Nirenberg and Khorana

Question 2 (NEET 2025)

DNA replication in living cells is:

(A) Conservative

(B) Dispersive

(D) Random

Question 3 (NEET 2025)

The genetic material of most living organisms is:

(A) Protein

(B) RNA

(D) Lipid

Question 4 (NEET 2024)

Which experiment proved that DNA is the genetic material in bacteria?

(A) Griffith's experiment

(B) Avery–MacLeod–McCarty experiment

(D) Meselson–Stahl experiment

Question 5 (NEET 2024)

The codon AUG codes for:

(A) Stop signal

(B) Methionine

(D) Valine

Question 6 (NEET 2023)

The enzyme responsible for synthesizing RNA during transcription is:

(A) DNA Polymerase

(B) RNA Polymerase

(D) Helicase

Question 7 (NEET 2023)

DNA fingerprinting was developed by:

(A) Watson

(B) Alec Jeffreys

(D) Chargaff

Question 8 (NEET 2022)

The functional unit of heredity is:

(A) Chromosome

(B) Gene

(D) Codon

Question 9 (NEET 2022)

Which RNA carries amino acids to the ribosome?

(A) mRNA

(B) rRNA

(D) snRNA

Question 10 (NEET 2022)

The Lac Operon model was proposed by:

(A) Jacob and Monod

(B) Watson and Crick

(D) Mendel

✅ Answer Key + Detailed Solutions

1. Answer: B – Watson and Crick

Explanation: James Watson and Francis Crick proposed the double-helical structure of DNA in 1953.

2. Answer: C – Semi-conservative

Explanation: During DNA replication, each daughter DNA molecule contains one parental strand and one newly synthesized strand.

3. Answer: C – DNA

Explanation: DNA is the hereditary material in almost all living organisms except some viruses.

4. Answer: B – Avery–MacLeod–McCarty experiment

Explanation: This experiment conclusively demonstrated that DNA is the transforming principle.

5. Answer: B – Methionine

Explanation: AUG is the initiation codon and codes for the amino acid methionine.

6. Answer: B – RNA Polymerase

Explanation: RNA polymerase synthesizes RNA using DNA as the template.

7. Answer: B – Alec Jeffreys

Explanation: Sir Alec Jeffreys developed DNA fingerprinting in 1984.

8. Answer: B – Gene

Explanation: A gene is the functional unit of heredity that carries genetic information.

9. Answer: C – tRNA

Explanation: Transfer RNA transports specific amino acids to the ribosome during protein synthesis.

10. Answer: A – Jacob and Monod

Explanation: François Jacob and Jacques Monod proposed the Lac Operon model explaining gene regulation in bacteria.

📚 More Free Biology Materials Available

📌 Class 11 Biology Notes

📌 Class 12 Biology Notes

📌 NEET Previous Year Question Papers

📌 Chapter Wise Tests

📌 Mock Test Series PDF

📌 Answer Key & Solutions

📌 Online Test Links

📌 Doubt Support Forms

🌐 Visit Our Website

NEET Biology Tamil

https://neetbiologytamilofficial.blogspot.com/

Motivation

"Revision turns information into confidence, and confidence into marks."

📖 எண்ணிய எண்ணியாங்கு எய்துவர் எண்ணியார்
திண்ணியர் ஆகப் பெறின்.

Meaning: Those who plan carefully and remain determined will achieve exactly what they set out to accomplish.

NEET Biology Tamil

Learn Biology Easily • Score High • Achieve Your Medical Dream

Search This Blog