Molecular Biochem

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9 Terms

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DNA

2 polynucleotide chains- double helix shape

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Double helix consists of

2 polynucleotide chains (string of nucleotides)

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What does a nucleotide consist of?

5 carbon sugar, phosphate group, and a nitrogenous base

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Sugar in DNA vs RNA

Deoxyribose in DNA, ribose in RNA.

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Nucleobases (Nitrogenous Base)

Purines (Pure Silver): purines (pure) and adenine and guanine (AG)

Pyrimidines- CUT the PYE

Cytosine, Uracil (RNA), Thymine, the PYrimidinEs

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how many rings do purines have?

2 fused aromatic rings. (1 six membered and 1 five membered)

*larger than pyrimidines

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how many rings do pyrimidines have?

1 six-membered ring

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what atoms are found in the rings of purines and pyrimidines?

carbon and nitrogen atoms

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why are ring structures important in nucleotide bases?

the enable the bases to form hydrogen bonds, essential for DNA and RNA structure and function