Class 12 · Biology · Chapter 5
Molecular Basis of Inheritance
Molecular Basis of Inheritance is one of the highest-yield chapters of Class 12 Biology — heavy in both Board and NEET. It traces how DNA was identified as the genetic material and how genetic information is stored, copied and expressed: the structure and packaging of DNA, the classic experiments (Griffith, Avery, Hershey-Chase, Meselson-Stahl), DNA replication, transcription, the genetic code, translation, regulation of gene expression via the lac operon, the Human Genome Project and DNA fingerprinting. Total: 17 sections including dedicated Solved Examples, Board and NEET practice, and a Summary.
Topics in this chapter
- 1
Introduction & DNA as the Genetic Material
30 min read · Quiz included
- 2
Structure of DNA — Polynucleotide Chain & the Double Helix
35 min read · Quiz included
- 3
Packaging of DNA — Nucleosome, Chromatin & Histones
30 min read · Quiz included
- 4
The Search for Genetic Material — Griffith's Transforming Principle
30 min read · Quiz included
- 5
Hershey–Chase Experiment, Properties of Genetic Material & the RNA World
35 min read · Quiz included
- 6
DNA Replication — Semiconservative Nature & the Meselson–Stahl Experiment
30 min read · Quiz included
- 7
The Machinery of Replication — Enzymes, Origin & the Replication Fork
35 min read · Quiz included
- 8
Transcription — Transcription Unit, the Gene & Types of RNA
35 min read · Quiz included
- 9
The Genetic Code — Features, Codons & tRNA the Adapter
35 min read · Quiz included
- 10
Translation — The Process of Protein Synthesis
30 min read · Quiz included
- 11
Regulation of Gene Expression — The Lac Operon
30 min read · Quiz included
- 12
Human Genome Project — Goals, Methods & Salient Features
30 min read · Quiz included
- 13
DNA Fingerprinting — VNTR, Technique & Applications
30 min read · Quiz included
- 14
Solved Examples
55 min read
- 15
Board Exam-Pattern Questions
55 min read
- 16
NEET-Pattern Practice Questions
25 min read · Quiz included
- 17
Summary & Exam Tips
30 min read