BIOL 101 Lecture 3: Organic Molecules of Life
21 Jan 2019
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Document Summary
Inorganic molecules do not contain a combination of carbon and hydrogen (h2o and. Total of 6 electrons- 4 in outer shell. Almost always shares electrons with element such as hydrogen, nitrogen and oxygen. Can bond with as many as 4 other elements. Most often shares electrons with other carbon atoms. Hydrocarbons- chains of carbon atoms bonded only to hydrogen atoms (highly versatile) Isomers- same number and kind of atoms in a variety of arrangements: may have different properties. 4 categories: carbohydrates (bread, pasta, rice, sugar), lipids (fat: oil, ice cream, cheese), protein (eggs, milk, meat, nuts) and nucleic acids (dna/rna) Dehydration synthesis reaction (get rid of water) Water is used to break the bond. Almost universally used as immediate energy source in living things. Polymers of monomers called saccharides or sugars (**glucose) 3-7 carbon backbone: 2 isomers- fructose and galactose, cells use glucose, as the energy source of choice, ribose and deoxyribose are found in rna and dna.
