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Lecture 3

BIOL 1010 Lecture 3: Lecture 2

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University of Manitoba
Biological Sciences
BIOL 1010
Emily A.Mc Kinnon

o|82 Bio 1010 Monomers are the building blocks of polymers. Calls link monomers together to form polymers by a dehydration reaction. This is a reaction that removes a molecule of water. For each monomer tat is added to a chain, a water molecule is released. Cells don’t only make macromolecules they must also break them down. You must digest these polymers to make their monomers available to your cells. This is through a digestion process called hydrolysis. It means to break with water. The bond between monomers is broken by the addition of a water molecule with the hydroxyl group from the water attaching to one monomer and a hydrogen attaching to the adjacent monomer. Both dehydration and hydrolysis require the help of enzymes to make and break bonds. Enzymes are specialized macromolecules that speedup chemical reactions in cells. 3.4: Carbohydrates refers to a class of molecules ranging from the small sugar molecules dissolved in soft drinks to large polysaccharides, such as the state molecules we consume in pasta and potatoes. The carbohydrate monomers are monosaccharides. Mono’s generally have molecular formulas that are some multiple of CH2O. Mono’s. particularly glucose, are the main fuel molecules for cellular work. Cells release energy from glucose when they break it down, an aqueous solution of glucose may be injected into the bloodstream of sick or injured patients, the glucose provides immediate energy source to tissues in need of repair. 3.5: Disaccharide is formed from two monosaccharide monomers by a dehydration reaction. One monomer
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