Question:
(i) Differentiate between a DNA and RNA nucleotide.
(ii) Name the two types of bonds present within a single nucleotide.
(i) Differentiate between a DNA and RNA nucleotide.
(ii) Name the two types of bonds present within a single nucleotide.
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(i) Compare the sugar and one base. (ii) One bond joins base and sugar, the other joins phosphate and sugar.
Updated On: Oct 23, 2026
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Solution and Explanation
Step 1: Part (i): the common parts:
Every nucleotide has three parts: a nitrogenous base, a pentose sugar and a phosphate group.
Step 2: Part (i): DNA nucleotide:
A DNA nucleotide has the sugar deoxyribose, which has H at the 2 position. Its bases are A, G, C and thymine (T).
Step 3: Part (i): RNA nucleotide:
An RNA nucleotide has the sugar ribose, which has an OH group at the 2 position. Its bases are A, G, C and uracil (U).
Step 4: Part (ii): bonds inside one nucleotide:
The base is joined to the 1 position of the sugar by an N-glycosidic bond.
The phosphate group is joined to the 5 position OH of the sugar by a phosphoester bond.
Final Answer:
(i) DNA nucleotide has deoxyribose and thymine, RNA nucleotide has ribose and uracil. (ii) N-glycosidic bond and phosphoester bond.
Every nucleotide has three parts: a nitrogenous base, a pentose sugar and a phosphate group.
Step 2: Part (i): DNA nucleotide:
A DNA nucleotide has the sugar deoxyribose, which has H at the 2 position. Its bases are A, G, C and thymine (T).
Step 3: Part (i): RNA nucleotide:
An RNA nucleotide has the sugar ribose, which has an OH group at the 2 position. Its bases are A, G, C and uracil (U).
Step 4: Part (ii): bonds inside one nucleotide:
The base is joined to the 1 position of the sugar by an N-glycosidic bond.
The phosphate group is joined to the 5 position OH of the sugar by a phosphoester bond.
Final Answer:
(i) DNA nucleotide has deoxyribose and thymine, RNA nucleotide has ribose and uracil. (ii) N-glycosidic bond and phosphoester bond.
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