What makes a nucleotide polar?

The hydroxyl groups of the sugar residues form hydrogen bonds with water. ... The backbone of alternating 3' pentose and phosphate groups of both DNA andRNA is highly polar. All the phosphodiester linkages in DNA and RNA strands have the same orientation along the chain (Fig.

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the "dirty dozen" chemicals banned in an international treaty are formally known as persistent organic pollutants, or pops. the united nations environment program provided this background on what they are and what they can do to humans and wildlife.

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