Biology / Bio 0221 · Atom · ~20 seconds
DNA and RNA
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DNA and RNA are the two nucleic acids built from nucleotide chains, differing in sugar, strand count, and one of four bases.
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DNA carries deoxyribose, usually pairs into two strands, and uses thymine; RNA carries ribose, usually stays single-stranded, and uses uracil instead.
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This unit stops at nucleic-acid structure — DNA replication and RNA's role in protein synthesis are later units' work.