BY Team Aakash Byju's

Class 12 Biology Revision Notes: Structure of DNA and RNA

Let us see some important notes that can be added to your revision notes on ‘Molecular Basis of Inheritance’.

Start your study by learning what is DNA,  its full form and  the proposed models of DNA structure.

Also, study the structure of ‘Polynucleotide’ and what are the three constituents of a nucleotide.

Learn the definition of  Gene, RNA and the  three primary types of RNA molecules.

Study the packaging of DNA helix which explains how DNA in prokaryotes is observed and arranged.

You will need to revise the five types of histones definitions of nucleosomes, and the definition of Euchromatin and Heterochromatin.

In the RNA world topic, you must study the concepts of Transcription, Mutations and Genetic Code and Translation.

Study how gene expression is regulated by environmental, physiological and metabolic conditions.

Don’t miss out on the topics - Polymorphism, DNA fingerprinting, the functions of the Promoter, differences between mRNA & tRNA and finally the goals of the Human Genome Project.

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