NEET biology molecular basis of inheritance Short Notes 2027, Chapter 5 NCERT+PYQ
Hello friend, l am a NEET Dropper. Today I'm sharing complete notes molecular basis of inheritance Class 12 biology Chapter 5 *Molecular Basis of Inheritance - Short Notes* *1. DNA: The Genetic Material* *Why DNA, not RNA?* DNA is more stable due to 2'-H in deoxyribose, thymine instead of uracil, and double helix structure. RNA acts as genetic material only in some viruses like TMV. *2. Structure of DNA* *Double Helix Model*: Given by Watson & Crick based on Franklin's X-ray data. - *Backbone*: Sugar-phosphate on outside - *Bases*: A-T with 2 H-bonds, G-C with 3 H-bonds, inside - *Antiparallel*: One strand 5'→3', other 3'→5' - *Pitch*: 3.4 nm, 10 base pairs per turn, 0.34 nm per bp 5' —S—P—S—P—S— 3' | | | | A T G C | |...