Question

question 4 of 10
what do all macromolecules have in common with each other?
a. they all are formed from the same elements.
b. they all have peptide bonds between carbon atoms.
c. they all act as catalysts in the body.
d. they all have major roles in cell membranes.

Explanation:

Macromolecules such as carbohydrates, lipids, proteins, and nucleic - acids are all composed of carbon, hydrogen, and oxygen. Some also contain nitrogen, phosphorus etc. Option B is wrong as only proteins have peptide bonds. Not all macromolecules are catalysts (only some proteins called enzymes are catalysts), so option C is incorrect. Not all macromolecules have major roles in cell membranes; for example, nucleic acids are mainly for storing and transmitting genetic information.

Answer:

A. They all are formed from the same elements.