A-LevelBiologyNucleic acids and protein synthesis9700/12 · May/June 2018 · Q241 Mark
XNA is a laboratory-made nucleic acid made of nucleotides in which one component has been replaced by chemical X. The chemical X is not found in nature. The part of the molecule responsible for coding is not changed. Which organic component of a DNA or RNA nucleotide has been replaced by X?
Afive-carbon sugar
Bphosphate group
Cpurine base
Dpyrimidine base
✓ Correct answer
A: five-carbon sugar
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