DNA is a nucleic acid, also known as a ____ (✓) . Many nucleotides are joined together to form it. One nucleotide consists of three parts; ____ (✓). One end of the phosphate group is bonded to the ____ (✓). On the other side of the nucleotide, the phosphate group is bonded to the ____ (✓) of another nucleotide. Both bonds are ____ phosphodiester bonds (✓). Repeated alternating sugar-phosphate bonds form the ____ (✓). The 1’ carbon of the sugar is covalently bonded to the ____ (✓) also through a condensation reaction to make up one complete nucleotide. DNA is a ____ (✓) in which nitrogenous bases form the centre of the structure, and both strands are held together by ____ (✓) between the complementary bases from each strand. A pairs up with ____, and C always pairs up with ____ (✓).

A1.2.6 DNA Structure

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