First slide

The DNA

Question

In the polynucleotide chain of DNA, a nitrogenous base is linked to the –OH of

Easy

A

1 $'$ C pentose sugar
B

2 $'$ C pentose sugar
C

3 $'$ C pentose sugar
D

5 $'$ C pentose sugar

Solution

In a polynucleotide chain, a nitrogenous base is linked to the OH of 1' C pentose sugar through a N-glycosidic linkage to form a nucleoside.
When a phosphate group is linked to OH of 5' C of a nucleoside through phosphoester linkage, a corresponding nucleotide (or deoxynucleotide depending upon the type of sugar present) is formed.
Two nucleotides are linked through 3'-5' phosphodiester linkage to form a dinucleotide.
A Polynucleotide chain

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