What Forms the "Backbone" of a Nucleic Acid

question 5

Multiple Choice

What forms the "backbone" of a nucleic acid?

• A)a chain of sugar and phosphate groups,linked through phosphodiester bonds
• B)purine and pyrimidine pairs,hydrogen-bonded to each other
• C)a chain of amino and carboxyl groups,linked via peptide bonds
• D)a double helix of antiparallel strands

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