Which of the following is NOT a function of proteins Select one:

Which of the following is NOT a function of proteins Select one:

a. Protection against disease

b. transport of substances

c. Cell signaling

d. Catalyzing chemical reactions

e. Energy storage

Answer: e. Cell signaling

Proteins perform multiple functions in the body, but energy storage does not fit into a primary function of proteins.
The key functions of proteins include:
a) Shield – Antibodies and other sorts of proteins provide protection from the foreign pathogens.
b) Carriage – Hemoglobin in red blood cell carries oxygen.
c) Cell signaling insulin is a protein hormone that leads cell signal.
d) Catalysis – Enzymes are catalytic proteins.

On the other hand, energy storage is not a significant direct function of proteins. The main energy storage molecules in the body are carbohydrates and fats rather than proteins. Energy storing and providing carbohydrates include glycogen and glucose. Adipose tissues store energy as triglycerides, consisting of fatty acids and glycerol.

Although proteins can be degraded as a source of energy in cases such starvation and malnourishment, the primary function is not that. Protein is also not well utilized for conversion into fat when in excess. Because proteins are not utilized by the body in order to store energy supplies, energy storage cannot be considered a principal activity of proteins . The other alternative options concern primary functions performed by proteins in the body.