2NO + O2 2NO2

The formation of photochemical smog is a result of a series of reactions between chemicals in the atmosphere and light. The oxidation of nitric oxide is shown above. What is the most likely catalyst (depicted by the squiggly arrow) in this reaction?

A)Sunlight
B)water vapor
C)free radicals
D)atmospheric enzyme

the sugar-phosphate backbone forms the structural framework of nucleic acids, including dna and rna. this backbone is composed of alternating sugar and phosphate groups, and defines directionality of the molecule.

the main thing i would use is bricks because if there is a hurricane, there is a great possibility for the house to still stand. and i would also use plexiglass windows instead of regular windows because plexiglass isn't prone to breaking.