Semiconservative DNA Replication | Meselson Stahl Experiment | NEET Class 12 | Neela Bakore

◀ PREVIOUS VIDEO (14/26): DNA Replication – Part 3    • DNA Replication Part 3 | Origin of Replica...   ▶ CURRENT VIDEO (15/26): Semiconservative DNA Replication    • Semiconservative DNA Replication | Meselso...   ▶ NEXT VIDEO (16/26): Transcription    • Transcription | Template Strand RNA Polyme...   🔗 Full Playlist:    • Плейлист   ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ Watson and Crick predicted it — Meselson and Stahl proved it! This video covers the elegant experiment that confirmed semiconservative DNA replication. 📌 Topics Covered: • Three models of replication: Semiconservative, Conservative, Dispersive • Meselson and Stahl experiment (1958) using E. coli • ¹⁵N (heavy) and ¹⁴N (light) isotopes of nitrogen • CsCl density gradient ultracentrifugation • Results after 1 generation: hybrid (intermediate) band • Results after 2 generations: hybrid + light bands • Why only semiconservative model fits these results • NEET MCQ patterns on Meselson-Stahl ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ Transcript with Timestamp 0:00 Semiconservative replication: one old strand + one new strand retained 1:13 Meselson & Stahl experiment using heavy nitrogen N15 in E. coli 2:30 N15 vs N14 separated by cesium chloride density gradient 3:06 Started with N15/N15 DNA → transferred to N14 medium 4:06 1st generation: N15/N14 hybrid DNA 4:49 2nd generation: hybrid + N14/N14 (light) DNA 7:44 Result: heavy → hybrid → hybrid + light (confirmed semiconservative) 9:16 Taylor's experiment: root tip cells of Vicia faba using tritiated thymidine 10:23 Both experiments confirmed semiconservative replication ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ Amazon Brand Store at https://www.amazon.in/neelabakoretuto.... Complete Study Notes (11th and 12th) are available at: https://amzn.to/3K4Li7k Complete Study Notes for 12th are available at: https://amzn.to/3PRhWjm Complete Study Notes for 11th are available at: https://amzn.to/4uw1hBa The study notes for this unit Genetics & Evolution are available at https://amzn.to/2Sh27jW The study notes for other units: - Diversity in Living World - https://amzn.to/3r8qkyH Structural Organisation in Plants and Animals - https://amzn.to/3r2cxmZ Cell: Structure and Functions - https://amzn.to/2GPagcm Plant Physiology - http://amzn.to/2EZR5HS Human Physiology - http://amzn.to/2DA46ea Reproduction - https://amzn.to/2wu43eS Biotechnology - http://amzn.to/2EZyqf9 Biology in Human Welfare https://amzn.to/4dPRZd7 Ecology https://amzn.to/3RwuOvF ____________________________________________ For business inquiries: abhibakore@gmail.com ___________________________________________ #SemiconservativeReplication #MeselsonStahl #DNAReplication #NEETBiology #MolecularBasisOfInheritance #Class12Biology #neelabakoretutorials