OBJECTIVE LIFE SCIENCE
BIOCHEMISTRY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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covalent bond
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phosphodiester bonds
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nucleotide bonds
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all of the above
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Detailed explanation-1: -The links between the nucleotides are the phosphodiester bonds (nucleotide phosphodiester bond).
Detailed explanation-2: -The bond joining two successive nucleotides in the same strand of DNA is called the phosphodiester bond. the phosphodiester bond is the linkage between the 3’ carbon atom of one sugar molecule and the 5’ carbon atom of another, deoxyribose in DNA and ribose in RNA.
Detailed explanation-3: -When nucleotides are incorporated into DNA, adjacent nucleotides are linked by a phosphodiester bond: a covalent bond is formed between the 5’ phosphate group of one nucleotide and the 3’-OH group of another (see below). In this manner, each strand of DNA has a “backbone” of phosphate-sugar-phosphate-sugar-phosphate.
Detailed explanation-4: -Phosphodiester Bond Formation These are two condensation reactions, so two molecules of water are produced. The phosphate is then bonded to the sugars by two ester bonds, hence the nomenclature of phosphodiester bond.