AP BIOLOGY

THE MOLECULAR BASIS OF INHERITANCE

STRUCTURE OF NUCLEIC ACIDS

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Name of the covalent bond which holds nucleotides together.
A
Phosphodiester Bond
B
Amino Bond
C
Nucleic Bond
D
Peptide Bond
Explanation: 

Detailed explanation-1: -A special type of covalent bond called a phosphodiester bond forms between nucleotides. These phosphodiester bonds form the two strands that make up the DNA molecule.

Detailed explanation-2: -DNA and RNA are composed of nucleotides that are linked to one another in a chain by chemical bonds, called ester bonds, between the sugar base of one nucleotide and the phosphate group of the adjacent nucleotide.

Detailed explanation-3: -The other name for the phosphodiester bond is phosphoester bond. Biology definition: A phosphodiester bond is a chemical bond that forms when exactly two hydroxyl groups in phosphoric acid react with a hydroxyl group on other molecules forming ester bonds. It is found in the DNA and RNA backbone.

Detailed explanation-4: -A phospodiester bond is a covalent bond in which a phosphate group joins adjacent carbons through ester linkages. The bond is the result of a condensation reaction between a hydroxyl group of two sugar groups and a phosphate group.

Detailed explanation-5: -Answer and Explanation: Nucleotides are held together by phosphodiester bonds. Phosphodiester bonds are formed by the condensation of the 3’ OH group of a sugar on one nucleotide to the 5’ phosphate group of the next nucleotide.

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