Question

which of the following is not a type of macromolecule? carbohydrates proteins lipids metals

Explanation:

Macromolecules in biology include carbohydrates, proteins, and lipids (though lipids are sometimes considered differently but still biological macromolecules - related). Metals are elements, not biological macromolecules. Carbohydrates, proteins, and lipids are types of biological macromolecules involved in cellular structures/functions. Metals are not part of this group.

Answer:

D. Metals