Which of the following is not a function of proteins?

Proteins are chemicals that are essential for many processes in the body, but not all proteins are created equal. Proteins are essential for many bodily functions and play a role in a variety of chemical reactions. Some proteins, like enzymes, are catalysts that speed up chemical reactions. Others, like antibodies, help the body fight infection. However, proteins don’t just work in one particular way- they can do several things at once. This is why proteins are sometimes called “multi-functional molecules.”

Which of the following is not a function of proteins?

  1. Formation of hair, wool, skin, and nails.
  2. As a biological catalyst in the form of enzymes.
  3. As food in the form of meat, eggs.
  4. As an energy provider for metabolism.


Proteins can be found in hair, nails, wool, and skin. The formation of hairs, nails, wool, and skin for the human and animal bodies is one of the functions of proteins.
Protein is abundant in some foods. Eggs, fish, and meat are among them. As a result, another important function of proteins is that they are a component of food. Enzymes play a crucial role in biological catalysis. They catalyze a variety of bodily functions. Amino acids are the building blocks of enzymes. Enzymes are thus proteins. Proteins also have the ability to act as biological catalysts.
Proteins, on the other hand, do not provide energy for metabolism. The energy for metabolism is provided by glucose. Glucose is a carbohydrate, not an enzyme. Glucose is a monosaccharide, which means it is a carbohydrate. Proteins contain amino acids, whereas glucose does not.

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Thus, the energy provider is not a function of proteins.

Therefore the correct answer is ‘No 4’ (As an energy provider for metabolism.)

The Youtube video below also fully explains this concept.

Frequently Asked Questions

What are 4 functions of proteins?

Proteins play a structural role in the body, forming the basis for muscles, bones, and other tissues.
Proteins are essential for the proper functioning of the immune system.
Proteins help carry out chemical reactions in the body.
Proteins are necessary for the transport and storage of nutrients throughout the body.

What are the functions of proteins?

Proteins are essential for life – they play a role in almost every process that goes on in our bodies. They help to build and maintain our tissues, transport nutrients and oxygen around the body, and fight off infection.

What are the three proteins?

The three proteins are albumin, globulin, and fibrinogen. Albumin is the most common protein in the blood and is responsible for maintaining the osmotic pressure of the blood. Globulin is a large protein that is responsible for transporting lipids and cholesterol through the blood. Fibrinogen is a protein that is responsible for clotting blood.


In conclusion, proteins play many essential roles in the body. They are responsible for everything from cell growth and division to the transport of molecules around the body. The one role that proteins do not play is energy production; that job is left to carbohydrates and lipids. So while proteins are not essential for survival, they are essential for good health. Make sure you include enough protein in your diet to keep you healthy and strong.

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