How much of the DNA contains coding information? How much is non-coding information?

Question

How much of the DNA contains coding information? How much is non-coding information?

Answer 1

It varies depending on the species.

Bacterial (prokaryotic) genome doesn't contain any introns (introns are non-coding regions within the genes) so almost all the DNA is coding for proteins or RNA.

Eukaryotic DNA contains introns. Moreover, there are also intergenic (in between two genes) non-coding sequences. There is a rough correlation between genome size and organism complexity. More complex the organism, larger the genome size and lesser the gene density. Thus, maximum portion of human genome is non-coding. This relationship is not perfect though.

To answer your question, 1.5% of total human genome is coding region (not including regulatory sequences) or exons and remaining 98.5% is non-coding.

Answer 2

about 99% of human dna is non coding