Question

element that helps to distinguish proteins and nucleic acids from carbohydrates and lipids is missing from the chart. what is that element?
these important macromolecules act as catalysts to help carry out the thousands of chemical reactions that take place in cells.
what is this macromolecule?
a lipid - hormone
b protein - enzyme
c nucleic acid - rna
d carbohydrate - cellulose

Explanation:

Macromolecules that act as catalysts to help carry out chemical reactions are enzymes. Enzymes are proteins. Proteins contain nitrogen, while carbohydrates and lipids do not.

Answer:

B. protein - enzyme; A. nitrogen (N)