what does DNA molecule contains name the functional segment of DNA in which form is the DNA present in a cell when the cell is not dividing
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DNA (deoxyribonucleic acid) is a double helix molecule made up of long chains of nucleotides.
Nucleotides are joined with each other with the help of phospho-di-ester bond.
A nucleotide consists of a deoxyribose sugar, a phosphate group, and a nitrogenous base (adenine, cytosine, tyrosine, or guanine). Sugar and phosphate group make the backbone of the DNA whereas as nitrogenous bases are involved in the formation of base-pairs.
A gene is a functional unit of heredity. It can also be defined as the segment of DNA which codes for a particular molecule.
DNA is present as chromatin fiber in non-diving cells. It is formed with the help of nucleosomes.
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