CHEM 210 Module 6 Exam Newest
1. What is the difference between a nucleoside and nucleotide?: A nucleoside
is formed from the covalent bonding of a base (purine or pyrimidine) to either ribose (RNA) or 2-deoxyribose (DNA). Nucleotides are built from a nitrogen-containing organic base, a monosaccharide, and phosphate.
2. What characteristic makes purines and pyrimidine heterocyclic?: Each has
a ring with nitrogen in the ring instead of all carbon atoms in the ring.
- Is this molecule ribose or 2-deoxyribose? Briefly explain what structural
information was used to determine this.: Ribose. This molecule contains an -OH
on carbon 2. 2-deoxyribose has an -H atom on the second carbon.
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