Polarity of bonds and molecules is determined by the of the atoms involved.

Explanation:

Polarity is defined as the formation of opposite charges on the atoms of a compound due to the difference in their electronegativities.

For example, in a HCl molecule chlorine is more electronegative in nature as compared to the hydrogen atom.

Hence, chlorine will attract the valence electron of hydrogen atom more towards itself. Due to this a partial positive charge will develop on hydrogen atom and a partial negative charge will develop on the chlorine atom.

Thus, we can conclude that polarity of bonds and molecules is determined by the difference in electronegativity of the atoms involved.

the sugar-phosphate backbone forms the structural framework of nucleic acids, including dna and rna. this backbone is composed of alternating sugar and phosphate groups, and defines directionality of the molecule.

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