What is Protein? Definition, Meaning & Example
A large organic molecule made of amino acids that performs various functions in living organisms.
TL;DR: A large organic molecule made of amino acids that performs various functions in living organisms.
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Protein: A large organic molecule made of amino acids that performs various functions in living organisms.
Explanation
Proteins are one of the four major biomolecules and are essential for life. They are made of amino acids linked together in chains. Different proteins perform different functions: enzymes speed up reactions, antibodies fight infections, hemoglobin carries oxygen, insulin regulates blood sugar. Proteins are found in all cells and perform structural, regulatory, and functional roles. Sources of dietary protein include meat, eggs, beans, and nuts. Proteins are digested into amino acids and used by your body for growth and repair. In Indian traditional diets, legumes and pulses are important protein sources.
Example
Hemoglobin is a protein in red blood cells that carries oxygen. Amylase is a protein enzyme that breaks down starch in your saliva.
Frequently Asked Questions
What are amino acids?
Amino acids are organic molecules that link together to form proteins. There are 20 different amino acids used by the human body.
Why are proteins important in diet?
Proteins provide amino acids needed for building and repairing muscles, bones, skin, and other tissues. They also form enzymes and antibodies.
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