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Which of the following statements is FALSE?
Purines and pyrimidines are two classes of bases found in DNA and RNA.
Nitrogen base, a sugar, and a phosphate group combine to make a nucleotide.
Sugars and nitrogen bases make nucleosides.
The phosphate group in the nucleotide is always attached to the 5' carbon of the ribose sugar.
DNA has a pentose sugar whereas RNA has a hexose sugar as the basic unit.
DNA has sugar with no oxygen in second carbon whereas RNA has same sugar but with oxygen in the second carbon.