Question

Which statements describe the structure of each type of macromolecule? Check all that apply.

The building blocks of carbohydrates are sugars that are made of carbon, hydrogen, and oxygen.

The building blocks of lipids are molecules that contain mostly carbon and hydrogen.

The building blocks of proteins are amino acids made of carbon and nitrogen only.

The building blocks of nucleic acids are nucleotides made of carbon, hydrogen, oxygen, nitrogen, and phosphorous.

Answer 1

Correct: statements 1, 2, and 4.

- 1 is true: carbohydrates are built from sugars (monosaccharides) made of C, H, and O.
- 2 is true: lipid building blocks (fatty acids, glycerol) are mostly carbon and hydrogen (hydrophobic).
- 4 is true: nucleotides contain C, H, O, N, and P.

Statement 3 is false: amino acids contain C, H, N and also O (and some contain S), not only carbon and nitrogen.