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Vocabulary flashcards about DNA structure.
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DNA (deoxyribonucleic acid)
A double helix made of two strands.
Nucleotide
The building block of each DNA strand, containing a phosphate group, a deoxyribose sugar, and a nitrogenous base (A, T, C, G).
Base Pairing Rules
Adenine (A) pairs with Thymine (T), and Cytosine (C) pairs with Guanine (G).
Sugar-phosphate backbone
The structural component on the outside of the DNA double helix.
Mutation
A change in the DNA sequence that can be harmless, harmful, or beneficial, caused by factors like radiation, chemicals, and replication errors.