Question

Which of the following contains nitrogen?

a) carbohydrates

b) protiens

c) lipids

d) water

Answer 1

Option(b)protein is correct answer.

Because
Proteins are chains (polymers) of alpha amino acids. Amino acids contain at least one nitrogen (amino) atom, which makes them different from carbohydrates. However, some carbohydrates like glucosamine and mucopolysaccharides do contain nitrogen atoms. The carbohydrates might have a nitrogen atom, but amino acids and proteins always have nitrogen atoms.