Proteins are one of the three macronutrients found in the diet and important structural molecule organisms. Proteins help provide structure to cells and are the major component of enzymes that pa biological reactions. While all macronutrients share similarities, proteins are different than both care lipids in important ways. The following statements are all true regarding amino acids and proteins.

Select which statements al proteins alone and which statements are true of all proteins, carbohydrates, and fats.

The human body is able to synthesize them

Contains nitrogen in the amine group

Made according to instructions from DNA