Question

Which one is not a function of protein in living organism?

• A. Transport nutrient across cell membrane
• B. Work as enzyme
• C. Work as receptor
• D. Main source of energy

Answer 1

The correct option is D Main source of energy

Proteins are an important component and are the building block of each cell and perform various functions like:

• Proteins act as the transporter, it transports the minerals and nutrients across the cell membrane, transport oxygen molecule and is responsible for the connection of the two cells.
• All the enzymes are proteins and they catalyze various reactions and increases the speed of the reaction.
• Receptors are the proteins that receive some chemical signals and respond according to them. They change their physiology according to the chemical reaction and signals.
• ATP is the main source of energy, proteins and fats are the nutrients that sometimes help in the production of a small amount of energy.

So, the correct option is 'Main energy source'.