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Standard XII
Chemistry
DNA
In both DNA a...
Question
In both DNA and RNA, heterocyclic base and phosphate ester linkages are at
A
and
respectively of the sugar molecule
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B
and
respectively of the sugar molecule
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C
and
respectively of the sugar molecule
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D
and
respectively of the sugar molecule
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Solution
The correct option is
C
and
respectively of the sugar molecule
Option (c)
You can see that the base is at the
C
′
1
carbon and the phosphate linkage is at the
C
′
5
carbon.
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Polynucleotides are called nucleic acids. Each nucleotide is made up of three parts, i.e, a pentose sugar, a heterocyclic nitrogenous base and phosphoric acid. Depending upon the nature of sugar whether, ribose or deoxyribose, nucleic acids are called RNA and DNA respectively. In all, there are five nitrogenous bases, two of which are purines while the remaining three are pyrimidines. Out of these five bases, each type of nucleic acid has four of them.
Which of the following sets of bases is present in both DNA and RNA?
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