Structure of DNA molecule (Watson and Crick model)

Flashcards covering the structural features of the Watson and Crick DNA model, including the double helix shape, anti-parallel strands, and base pairing.

Who are the scientists credited with the model of DNA structure that consists of two anti-parallel polynucleotide chains?

Watson and Crick

How many anti-parallel polynucleotide chains make up a DNA molecule?

$$2$$

What shape is formed when the two polynucleotide chains spiral around an imaginary axis?

Double helix

What term refers to the arrangement where the two sugar-phosphate backbones run in opposite directions from each other?

Anti-parallel

Where are the sugar-phosphate backbones located in the DNA double helix?

On the outside of the helix

Where are the nitrogenous bases located within the DNA molecule?

Paired in the interior of the helix

What type of bonds hold the two DNA strands together by connecting the paired nitrogen bases?

Hydrogen bonds