Proteins are large macromolecules that are made up of smaller units called amino acids, attached to form long chains. Proteins are required for maintaining the structure, function and regulation of the body's tissues and... More »

Also known as a whole protein, complete protein is a source that contains all the different kinds of amino acids. Animal foods, such as cheese, eggs, meat, poultry and milk, are considered sources of high-quality protei... More »

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Channel proteins are proteins that enable the transportation of certain substances and materials across cell membranes. Channel proteins consist of a wide group of more than 20 different organic compounds and, although t... More »

The four macromolecules of life are lipids, carbohydrates, proteins and nucleic acids. All living organisms are composed of each of these four polymers. More »

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Collagen belongs to the group of macromolecules known as proteins. It is found in the flesh and connective tissues of mammals. Collagen makes up 30 percent of the protein in the body on average. It gives strength and pro... More »

The four major macromolecules necessary for life are carbohydrates, lipids, proteins and nucleic acids. Carbohydrates are the most prevalent, and they are a source of immediate energy for living things. More »

The four types of macromolecules are nucleic acids, proteins, carbohydrates and lipids. These macromolecules are large molecules that make up most of the bodies of living things. They consist of chains of repeating units... More »