সম্পদৰ অদক্ষ অথবা নিম্ন ব্যৱহাৰ মানে কি
Anonymous:
u r from @Assam?
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Deoxyribonucleic acid is a molecule composed of two chains that coil around each other to form a double helix carrying the genetic instructions used in the growth, development, functioning, and reproduction of all known organisms and many viruses.
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