Biology Definitions

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Last updated 1:07 PM on 7/21/26
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4 Terms

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Gene

A gene is a small segment of DNA in a chromosome where its specific sequence of nucleotides codes for one polypeptide with a specific sequence of amino acids.

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DNA

A DNA molecule is a double stranded molecule that consists of two polynucleotide chains wound around each other to form a double helix.

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Polynucleotide chain

A polynucleotide chain has a sugar-phosphate backbone with nitrogenous bases projected at right angles and consists of nucleotides held together by strong covalent phosphodiester linkages.

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