what is gDNA and cDNA . what is the difference between gDNA  and cDNA and DNA ???

Dear student,                                                                                                                                                                    
Please find below the solution to the asked query  
gDNA represents genomic DNA of any organism whose genomic library provides clones of the genomes which is important to understand and study the genome of an organism and also helps in recombination. It represents DNA present in the cell i.e inside the mitochondria, nucleus (chromosomal DNA or simply DNA) and in chloroplast (in case of plant cells).

cDNA refers to the complementary DNA synthesized by the enzyme reverse transcriptase and DNA Polymerase from the mature eukaryotic messenger RNA. This mature messenger Eukaryotic mRNA does not contain any introns, it has only axons. The DNA, thus formed, is complementary to mRNA hence known as cDNA.

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