What organic molecules contain nitrogen

Nucleic acids. They are larger molecules made up of smaller units called nucleotides. Each nucleotide contains a carbohydrate molecule, a phosphate group, and a nitrogen-containing molecule.

Herman’s diet primarily consists of fats (300 grams/day) and carbohydrates (500 grams/day). These fats and carbohydrates have 9 calories/gram and 4 calories/gram, respectively. If Herman’s dietician asks him to try a new diet for a week consisting of more fruits and vegetables (600grams/day @ 0.5 calories/gram) and some lean protein (400grams/day @ 4 calories/gram), what would be the difference in his caloric intake?