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Name the four main groups of organic molecules in living things Describe the function of each type of molecule?

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2014-09-08 14:54:50
2014-09-08 14:54:50

1. . Carbohydrates: Carbohydrates are organic compounds made of carbon, hydrogen, and oxygen atoms. Carbs are made of monosacharrides (single sugars) linked together. Their function is to provide a key source of energy for cells. An example is starch, made of many linked glucose molecules.

2. Lipids: Lipids are nonpolar molecules that are not soluble in water. They include fats, phospholipids, steroids, and waxes. Lipids' functions are to provide energy and serve an important part in the structure and functioning of cell membranes. Some examples of lipids: butter (saturated fat), cholesterol (steroid), earwax (wax).

3. Proteins: Proteins are chains of amino acids. Proteins have a wide variety of functions. They can be enzymes, to promote chemical reactions; they can have important structural functions like collagen does in your skin. They can also help structure your ligaments, tendons, bones, hair, and muscles. They are found in fibers that help your blood clot. Proteins called antibodies help your body defend against infection. Other proteins in muscles allow them to contract (making body movement possible). Yet another type of protein called hemoglobin carries oxygen to cells throughout the body.

4. Nucleic acids: Nucleic acids are long chains of smaller molecules called nucleotides. Nucleic acids mainly serve the purpose of providing the organism with its genetic blueprint and coding. They basically tell you who you are.DNA and RNA are two types of nucleic acids.

*NANCY* it will be carbohydrates

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