Chromatin & chromosomes | Ch # 3 | Cells & sub cellular organelle | 1st year biology

In this lecture we will cover Chromatin and Chromosomes from 1st Year FSc Biology - Chapter 3: Cell Structure. What you will learn: Chromatin Kya Hai? - DNA + Histone Proteins ka combination Types of Chromatin: Euchromatin - Loosely coiled, Active DNA, Gene expression ON Heterochromatin - Tightly coiled, Inactive DNA, Gene expression OFF Chromosome Kya Hai? - Cell division ke dauran chromatin ki highly coiled form Structure of Chromosome: Chromatids, Centromere, Kinetochore, Telomere, Arms Types of Chromosomes based on Centromere Position: Metacentric, Sub-metacentric, Acrocentric, Telocentric Functions of Chromatin & Chromosomes Important Diagrams + MCQs + Board Short Questions We will understand how 2 meters of DNA fits inside a tiny nucleus and why chromosomes are only visible during Mitosis/Meiosis. This topic is very important for 1st Year Board Exams 2026 + MDCAT + Entry Tests. #1stYearBiology #FScPart1 #Chromatin #Chromosomes #CellStructure #Euchromatin #Heterochromatin #DNA #Centromere #Chapter3 #FScBiology #MDCAT2026 #BoardExams #BiologyLecture #Science #PakistanEducation #CellBiology #StudyWithMe #FScNewBook