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प्रश्न
Sketch and explain the structure of DNA.
आकृति
स्पष्ट कीजिए
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उत्तर
Structure of DNA
DNA (Watson of Cricks model)
The DNA molecule is a double-stranded helix where each strand is composed of basic units called nucleotides. Every nucleotide contains three parts: phosphoric acid, a deoxyribose sugar, and a nitrogenous base. These bases are either purines (adenine and guanine) or pyrimidines (cytosine and thymine). The two strands stay bound together because adenine always pairs with thymine via double hydrogen bonds, and cytosine always pairs with guanine via triple hydrogen bonds.
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