I have a basic doubt in molecular biology. Since iam not from a molecular biology background I have this kind of a doubt. As we know there are a total of 46 chromosomes in human and each chromosome has dna. my question is how many DNA does a single chromosome contain ?
also I want to know that when a human genome is represented, is the genome a combination/collection of DNA of all the 46 chromosomes?
I request experts in this field to answer this doubt
Thanks
Hi!
DNA is the polymer of which each chromosome is made, so the question "how many DNA does a single chromosome contain?" makes no sense unless you mean how long is the DNA sequence of each chromosome. The chromosomes have various lengths and sequences, so yes, the entire genome of a human being is made up of the sequences of all the chromosomes together.
Each chromosome contains one single molecule of DNA. So, in total, there are 46 DNA molecules in human chromosomes. The human nuclear genome is a combination of all 46 DNA molecules which is ~3.2 billion base pairs.
The DNA is a polynucleotide which we have to represent as basepairs or base. Whole Chromosome represent a DNA which differ in the size and shape of them.
Read more in Watson book or Basic Molecular Biology Books.
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