ORGANIC COMPOUNDS UNIT 5:LIFE SCIENCE.

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Presentation transcript:

ORGANIC COMPOUNDS UNIT 5:LIFE SCIENCE

ORGANIC COMPOUNDS The chemical compounds of living organisms are known as organic compounds. Organic compounds are molecules built around the element carbon (C ). Living things are made up of very large molecules. These large molecules are called macromolecules because “macro” means large. Our body gets the organic molecules we need from the food we eat The four main macromolecules found in living things are: 1. Proteins 2. Carbohydrates 3. Lipids 4. Nucleic Acid https://www.youtube.com/watch?v=MqO3_270X-s

CARBOHYDRATES Carbohydrates are sugars or long chains of sugar. An important role of carbohydrates is to store energy. Plants store sugar in long chains called starch, whereas animals store sugar in long chains called glycogen. You get the carbohydrates you need for energy from eating carbohydrate-rich foods, including fruits and vegetables, grains such bread, rice or corn.

PROTEINS Proteins are molecules that have many different functions in living things. All proteins are made of small molecules called amino acids that connect together like beads on a necklace. There are only 20 common amino acids needed to build proteins. These amino acids form in thousands of different combinations, making 100,000 or more unique proteins in humans. Proteins can differ in both number and order of amino acids. Small proteins have just a few hundred amino acids. The largest proteins have more than 25,00 amino acids.

PROTEINS Amino Acids connect together like beads on a necklace. Many important molecules in your body are protein. Enzymes are a type of protein that speed up chemical reactions. For example, your stomach would not be able to break down food if it did not have special enzymes to speed up the rate of digestion. Antibodies that protect you against disease are proteins. Muscle fiber is mostly protein. You must eat proteins to get amino acids. They come from foods such as beans, milk, or meat. The body breaks down protein into amino acids to build new proteins. You really are what you eat.

LIPIDS Lipids are molecules such as fats, oils, and waxes. The most common lipids in your diet are probably fats ad oils. Fats are solid at room temperature, whereas oils are fluid. Animals use fats for long-term energy storage and to keep warm. Plants use oils for long-term energy storage.. When you cook, you often use animal fats, such as butter, or plant oils, such olive or canola oil. Phospholipids are important lipids because they make up the protective outer membrane of all cells.

NUCLEIC ACIDS Nucleic acids are long chains of nucleotides. Nucleotides are made of a sugar, a nitrogen- containing base, and a phosphate group. Deoxyribonucleic acid (DNA) and ribonucleic acid (RNA) are the two main nucleic acids. DNA is the molecule that stores our genetic information. RNA is involved in making proteins. ATP, known as the “energy currency” of the cell, is also a nucleic acid.