In both DNA and RNA, nucleotides are linked together to form a strand. What type of bonding connects the sugar of one nucleotide to the phosphate of the next?

SLPaper 1A

RNA polymers are formed through condensation reactions. Which change occurs at the molecular level during this process?

SLPaper 1A

What links the two strands of DNA together in the double helix?

SLPaper 1A

The stability of DNA is partly due to its sugar–phosphate backbone. What makes this structure chemically stable under physiological conditions?

IB Biology Topic A1.2 Nucleic Acids Questionbank

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Hydrogen bonding

Ionic bonding

Covalent bonding

Peptide bonding

The nitrogenous base is removed from each monomer

A phosphate group is split into ions

A water molecule is released when a bond forms between sugar and phosphate

The ribose sugar is oxidized to form a bond

Covalent bonds between nitrogenous bases

Hydrogen bonds between complementary bases

Ionic bonds between phosphates and sugars

Peptide bonds between amino acids

Regularly spaced hydrogen bonds between phosphate groups

Hydrophobic interactions between adjacent bases

Strong phosphodiester bonds between nucleotides

Ionic attraction between sugar and phosphate groups