DNA Structure

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Vocabulary flashcards about DNA structure.

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5 Terms

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DNA (deoxyribonucleic acid)

A double helix made of two strands.

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Nucleotide

The building block of each DNA strand, containing a phosphate group, a deoxyribose sugar, and a nitrogenous base (A, T, C, G).

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Base Pairing Rules

Adenine (A) pairs with Thymine (T), and Cytosine (C) pairs with Guanine (G).

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Sugar-phosphate backbone

The structural component on the outside of the DNA double helix.

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Mutation

A change in the DNA sequence that can be harmless, harmful, or beneficial, caused by factors like radiation, chemicals, and replication errors.