Question

What is the primary structural feature of DNA according to the Watson and Crick Model?

Options

• A double helix structure resembling a twisted ladder

• A branched polymer with multiple attachment points

• A single linear strand with helical coils

• A circular molecule with no defined structure

Answer 1

The Watson and Crick Model describes DNA as having a double helix structure that resembles a twisted ladder. The rails of this ladder are formed by the sugar-phosphate backbone, while the rungs are formed by pairs of purine and pyrimidine bases linked by hydrogen bonds.