Question

mark argues that proteins within the body have two functions: structure and transport. sara disagrees. which significant function of proteins did mark omit from his list?
a. proteins increase the speed of reactions in the body.
b. proteins store energy that can be released when the body needs it.
c. proteins form waxy, waterproof coverings.

Explanation:

Enzymes are proteins that act as biological catalysts, increasing the speed of chemical reactions in the body. This is a crucial function of proteins.

• Option B: Storing energy is mainly the role of fats and carbohydrates, not a primary function of proteins.
• Option C: Waxy, waterproof coverings are usually made by lipids (like in plant cuticles), not proteins.

Answer:

A. Proteins increase the speed of reactions in the body.