1. large biological macromolecules carry out several roles in the human body. What is one of these roles?

a. Provide structure on the cellular levels

B. store genetic material

C. store energy

D. all of the above

The correct answer is: D. all of the above

A macromolecule is a large molecule present in the cell, composed of a huge number of monomer units with the various functions. There are four main groups: proteins (monomers are amino acids), nucleic acids (monomers are nucleotids), lipids (monomers are free fatty acids) and carbohydrates (monomers are simple sugars such as glucose).

Some of their functions:

• Provide structure on the cellular levels-lipids (phospholipids) are the main components of the cell membrane;

• store genetic material-nucleic acid (DNA, RNA) are the carriers of genetic information

• store energy-starch is energy source in plants;

• enzymes - proteins often are with the functionin metabolism

• etc.