Question

What will be the length of the eukaryotic DNA segment having 10 pairs of nucleotides?

Answer 1

Hint: In the Eukaryotes, the sort of DNA present is referred to as the B DNA. B-DNA is found in nature as the most commonly occurring double helical structure. It is right handed in orientation having 10 base pairs per turn.

Complete answer:
DNA or deoxyribonucleic acid is the polymer of nucleotides. Each nucleotide comprises a nitrogenous base which may be purine (Adenine, Guanine) or pyrimidine (Cytosine, Thymine), a sugar and a phosphate group. These nucleotides serve as the building blocks for DNA. The sugar phosphate backbone is found on the outer side of the double stranded helix of DNA while nucleotide bases are present on the inner side of the helix.
Each complete turn of a double helical DNA consists of 10 nucleotide base pairs with the length of complete turn being 34 Angstroms.
Therefore the length of eukaryotic DNA fragments with 10 pairs of nucleotides will be 34 Angstroms.

Note: DNA or Deoxyribonucleic acid is the genetic material carrying hereditary information in most of the organisms. These are the biological macromolecules that help in the regulation of the cells as well as play a crucial role in the formation of proteins. Under normal physiological circumstances, B DNA is the most commonly occurring form of double helical DNA. It is a right-handed helical structure having double strands running in the opposite direction. Watson and Crick discovered this double helical structure of DNA through X-ray diffraction technique.