Which of the following best describes the main purpose of the sequences of nitrogenous bases in DNA? *

A gives DNA the shape needed for translation

B prevents mutations when coding for amino acids

C forming the hydrogen bonds between bases

D carries instructions for the traits of an organism

Pl which diagram illustrates prophase?

20 the compound al(nh3)2 has atoms of nitrogen.

American scientist, linus pauling, was one of many scientists racing to discover the molecular structure of dna. pauling initially thought that the molecule was a triple helix. later, james watson and francis crick unveiled their double helix model, which turned out to be an accurate description of the molecule's shape. why did watson and crick succeed when pauling failed?