The difference between a ribonucleotide and a deoxyribonucleotide is_____.
A
Deoxyribonucleotide has an -- H instead of an --OH at C-2.
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B
Deoxyribonucleotide has an α configuration; ribonucleotide has the β configuration; at C-1.
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C
Ribonucleotide has an extra --OH at C-4.
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D
Ribonucleotide has more structural flexibility than deoxyribonucleotide.
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Solution
The correct option is A Deoxyribonucleotide has an -- H instead of an --OH at C-2. A deoxyribonucleotide and a ribonucleotide are both formed by a sugar moiety, attached to a nitrogenous base and one or more phosphate groups. If the sugar present in the nucleotide is ribose sugar, it is a ribonucleotide. Whereas if the sugar present is derived from ribose by deoxygenation of the the -OH on the C-2, it is called a deoxyribose sugar and this moiety combines with the nitrogenous base and phosphate groups to form the deoxyribonucleotide.