Question

which is a difference between proteins and carbohydrates and fats? proteins are macromolecules; carbohydrates and fats are not. proteins are composed of monomers; carbohydrates and fats are not. carbohydrates and fats contain carbon, hydrogen, and oxygen; proteins do not. excess carbohydrates and fats are stored; excess proteins are not.

Explanation:

1. All three - proteins, carbohydrates, and fats - are macromolecules. Proteins are made of amino - acid monomers, carbohydrates of monosaccharides, and fats are composed of glycerol and fatty acids. Proteins contain carbon, hydrogen, oxygen, and nitrogen (and sometimes other elements like sulfur), while carbohydrates and fats contain carbon, hydrogen, and oxygen. Excess carbohydrates are stored as glycogen in animals and starch in plants, and excess fats are stored as adipose tissue. Excess proteins are not stored in the body in the same way; they are either used for energy or converted into fat through a series of metabolic processes.

Answer:

D. Excess carbohydrates and fats are stored; excess proteins are not.