Question

in addition to carbon, which elements are found in all biological macromolecules?
o nitrogen and oxygen
o hydrogen and nitrogen
o calcium and hydrogen
o hydrogen and oxygen

Explanation:

Biological macromolecules include carbohydrates, lipids, proteins, and nucleic acids. All of them contain carbon, hydrogen, and oxygen. While nitrogen is present in proteins and nucleic acids but not all macromolecules, and calcium is not a component of all biological macromolecules.

Answer:

D. hydrogen and oxygen