Nucleic Acids

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Introduction to DNA and RNA

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Nucleic acids

DNA + RNA

The genome

Structure of DNA

Structure of RNA

Nucleotide

DNA

RNA

Purines

Pyrimidines

Adenine and Guanine

Cytosine, Thymine and Uracil

Nucleoside

Bonding of nucleotides in DNA

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The 3'OH of sugar of one nucleotide is linked to the phosphate group on the 5'OH of the adjacent sugar. The chain has two ends 5' and 3'

Benzene rings with nitrogen substituted for carbons 1 and 3

Variety of shapes

Nitrogenous base bound to the sugar

Sugar lacks an oxygen atom

Benzene rings with nitrogen substituted for carbons 1 and 3 and have imidazole rings attached to them

Units of heredity

Sugar has the oxygen atom

Purines

Pyrimidines

Four different types of nucleotides that are arranged in different sequences

Double helix made up of two nucleic acid polymers that wrap around each other

A nitrogenous base, a sugar molecule and one or more phosphate groups

Linear polymers of nucleotides


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