Biomolecules Question 104
Question: Bond present between two nucleosides of a polynucleotide is:
Options:
A) Covalent bond
B) Hydrogen bond
C) Phosphodiester bond
D) High energy phosphate bond
Show Answer
Answer:
Correct Answer: C
Solution:
The sugars which are present in the nucleotide are ribose or deoxyribose. The nitrogenous bases are purines and pyrimidines.
The phosphate is present as phosphoric acid. The nucleotide is formed by the union of a phosphate group with a nucleoside.
A nucleoside, in fact, contains a sugar molecule along with an organic nitrogenous base.
Two nucleotides are attached by the phosphodiester bond formed by linkage of 3’ carbon atom of one sugar molecule and the 5’ carbon atom of another, deoxyribose in DNA and ribose in RNA.
BETA
