Nitrogen atoms are part of the structure of some organic molecules, such as all amino acids and some modified carbohydrates. what other organic molecules contain nitrogen?

a  solution  is always transparent, light passes through with no scattering from solute particles which are molecule in size. the  solution  is homogeneous and does not settle out. a colloid is intermediate between asolution  and a  suspension. while asuspension  will separate out a colloid will not.