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molecular basis of inheritance grade 12 (CBSE) Cheat Sheet (DRAFT) by

this sheet is based on the chapter molecular basis of genetics of class 12 it covers all the necessary details while being concise hope it helps

This is a draft cheat sheet. It is a work in progress and is not finished yet.

NUCLEIC ACIDS

Nucliec acids are the polymers of nucleo­tides
deoxyribo nucleic acid (DNA) and ribonu­cleic acid are the 2 types of nucleic acids
though RNA acts a genetic material in some viruses mostly functions as a messenger
RNA acts as adapter, structural and n some cases catalytic molecule
DNA ---->(trans­cri­ption) RNA ---->(trans­lation) PROTIEN
 

THE DNA

it is a long polymer of deoxyr­ibo­nuc­leo­tides
its length is defined by the number of nucleo­tides os base pairs present
ex: bacter­iophage has 5386 nucleo­tides bacter­iophage lambda has 48502 nucleo­tides E. coli has 4.6 bp haploid content of human dna is 3.3 x 109 bp

THE STRUCTURE OF POLYNU­CLE­OTIDE CHAIN

A nucleotide has 3 components :
~a nitrog­enous base
~pentose sugar {ribose for RNA and deoxyr­ibose for DNA}
~phosphate group
there are 2 types of nitrog­enous groups
~purines
~pyrim­idines
purine - adanin­e,g­uanine
pyrimidine - thymine, cytosine, uracil
dna contains thymine along with other nitrog­enous bases whereas rna contains uracil instead of thymine.
this is obviously incomplete but I'll make sure to complete it asap for y'all
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