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Download S7 - 2 - Molecules for Life
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Molecules for Life Unit 2 – Lesson 4 Molecules are the building blocks of LIFE! Combinations of Atoms • When atoms of more than one element combine, they form a compound. Compounds • Think of two elements that eachother… LOVE Compounds • Think of two elements that eachother… LOVE Compounds • Think of two elements that eachother… LOVE Compounds • Think of two elements that eachother… LOVE Compounds • Think of two elements that eachother… LOVE Compounds • Think of two elements that eachother… LOVE Compounds • Think of two elements that eachother… LOVE Compounds • Think of two elements that eachother… LOVE Compounds • Think of two elements that eachother… LOVE Compounds • Think of two elements that eachother… A COMPOUND! LOVE Types of Molecules • Molecules are elements that are bonded together. There are two types of molecules. – Organic Molecules – living or once living – Inorganic Molecules – nonliving Types of Molecules • Remember the elements carbon and hydrogen? Well, when these elements are found together, they make an ORGANIC molecule. • Organic = C + H together • Inorganic = no C + H together SO, everything that is living is ORGANIC, it contains C and H. Organic or Inorganic? Inorganic Molecules • There are millions of inorganic molecules, but there are only a few you MUST know • H2O = water • O2 = oxygen • CO2 = carbon dioxide • NH3 = ammonia Organic Molecules • There are 4 types of organic molecules. • Meaning, EVERYTHING that is living is made up of a mixture of these 4 substances. – Proteins – Carbohydrates (Sugars) – Lipids (Fats) – Nucleic Acids (DNA) You are what you eat! Protein, Carbs, and Fats are our nutrition! Organic Molecules • Organisms either consume or produce their nutrition. The organic molecules need to be broken down so they can be used for various needs. Complex Molecules: Simple Units: Proteins Amino Acids Carbs Simple Sugars Lipids Fatty Acids LEGO DEMO Proteins • The building blocks of proteins are amino acids. • Proteins are important for many reasons. – Enzymes – chemical reactions – Body growth and repair What kinds of protein do we eat? Carbohydrates • The building blocks of carbohydrates are simple sugars. • C6H12O6 is sugar. Because of sugars structure, it is represented as in science. • Carbohydrates provide: – Energy What kinds of carbs do we eat? Lipids • The building blocks of lipids are fatty acids. • Lipids are important because they: – Provide stored energy – Make up the cell membrane What kinds of fat do we eat? Nucleic Acids • Nucleic Acids make up the organisms heredity. It is the DNA, or the genetic code for all living things. • Yes, every living organism from a bacterium to a whale has DNA.
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