CBSE Class 12-science Answered

Dear Divyashri,

Answer to one of your questions is given below:

DNA or Deoxyribonucleic acid is the genetic material present in the nucleus of eukaryotic organisms. The nucleus contains chromatin fibres composed of DNA and proteins. DNA is composed of two polynucleotide strands which form a ladder. The nitrogenous bases (adenine, guanine, thymine and cytosine) in the DNA store the information for the synthesis of polypeptide chains, essentially coding for every feature of the entire organism.

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Topperlearning Team.