BIOLOGY 151 Chapter Notes - Chapter 1: Dietary Fiber, Monosaccharide, Dehydration Reaction

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BIOLOGICAL MOLECULES
Macromolecules : large molecules necessary for life that are built from smaller org.
Molecules
Carbohydrates
Lipids
Proteins
Nucleic acids
CARBON
The “foundation” element for molecules in living things
CARBON BONDING
Can form covalent bonds with other atoms/molecules
Molecules can form rings which can link with other rings
CARBOHYDRATES
Provide energy to the body (through glucose which is a simple sugar)
Monosaccharides: simple sugars (common is glucose)
# of carbon atoms ~3-6
-ose
Photosynthesis: plants synthesize glucose using co2 and water by this
Disaccharides: form when 2 monosaccharides goes through dehydration reaction
(-OH) of a monosaccharide combines w/ a hydrogen atom of another mono.
While releasing a molecule of h2o and forming a covalent bond between atoms in
the 2 sugar molecules
Polysaccharide: long chain of monosaccharides linked by a covalent bond
Starch: stored form of sugars in plants and is made up of amylose and
amylopectin
Where excess starch is stored
Glycogen: storage form of glucose in humans/ other vertebrates and made up of
monomers of glucose
It’s the animal version of starch stored in liver and muscle cells
Cellulose: natural biopolymers; makes up the walls of plants
Cellulose passing through our digestive system is dietary fiber
Chitin: nitrogenous carb; made of repeating units of modified sugar containing nitrogen
LIPIDS
Hydrophobic bc they’re nonpolar molecules
Hydrocarbons that include only nonpolar carbon-carbon
Provide insulation from environment for plants and animals
Fats, oils, waxes, phospholipids, steroids
Fat: ex. Triglyceride consists of glycerol and fatty acids
Glycerol: organic compound w/ 3 carbon atoms, 5 hydrogen atoms, 3 -OH groups
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Document Summary

Macromolecules : large molecules necessary for life that are built from smaller org. The foundation element for molecules in living things. Can form covalent bonds with other atoms/molecules. Molecules can form rings which can link with other rings. Provide energy to the body (through glucose which is a simple sugar) Photosynthesis: plants synthesize glucose using co2 and water by this. Disaccharides: form when 2 monosaccharides goes through dehydration reaction. (-oh) of a monosaccharide combines w/ a hydrogen atom of another mono. While releasing a molecule of h2o and forming a covalent bond between atoms in the 2 sugar molecules. Polysaccharide: long chain of monosaccharides linked by a covalent bond. Starch: stored form of sugars in plants and is made up of amylose and amylopectin. Glycogen: storage form of glucose in humans/ other vertebrates and made up of monomers of glucose. It"s the animal version of starch stored in liver and muscle cells.

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