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carbohydrates (saccharides)
Biomolecule that includes sugar, starch, or cellulose and it serves as a major energy source in the diet of animals. These compounds contain only CARBON, HYDROGEN, and OXYGEN, usually in the ratio 1:2:1.
principle functions of carbs
chief source of energy to the body, stored for later energy needs, component of other biological compounds
monosaccharides
basic or simple sugars
glucose (monosaccarides)
main energy source
fructose (monosaccharides)
principle sugar in fruits
galactose (monosaccharides)
found in milk
disaccharides
two monosaccharides bound together
sucrose (disacc)
glucose and fructose, table sugar
lactose (disacc)
glucose and galactose, principle carbs in milk
maltose (disacc)
glucose and glucose, main carbs in plants
glycolysis
process of converting glucose to pyruvic and lactic acids
Polymer
A large molecule formed by many repeating monomers.
Monomer
A smaller unit that is the BUILDING BLOCK of a polymer.
Protein
macromolecules that contain carbon, hydrogen, oxygen, nitrogen, and usually sulfur and are needed to build and repair body structures and to regulate processes in the body.
Amino Acid
The monomer/building block for proteins.
Enzyme
A specialized protein that catalyzes (speeds up) the chemical reactions of a cell.
Polysaccharide
A polymer of 3 or more monosaccharides, formed by dehydration reactions.
Ex. Starch, Cellulose
Dehydration Synthesis
A chemical reaction in which two molecules are bonded together with the REMOVAL of a water molecule.
Starch
Polysaccharide made up of a chain of glucose (monosaccharide) molecules. A complex carbohydrate in which plants store energy
Phospholipid
A lipid made of a phosphate group and two fatty acids; Consists of a hydrophilic polar head and two hydrophobic non
Cell membrane
The phospholipid bilayer that forms the outer boundary of the cell
Biomolecules
Organic molecules such as proteins, nucleic acids, carbohydrates, and fats.
Lipids
molecule consisting of CH and a little O includes: fats, oils and waxes. monomer is a glycerol and three fatty acids.
Nucleic acids
Hold our genetic information. Examples are DNA and RNA. molecules consists of many nucleotides linked in a long chain.
substrate
The reactant , molecule upon which an enzyme acts
active site
site on enzyme which binds a particular molecule (called its substrate).
activation energy
The minimum amount of energy required to break the bonds between atoms of the reactants
cellulose
cell wall of plant cell
glycogen
animals store extra glucose
chitin
makes exoskeleton of crustaceans (crab type)
hydrolysis
process of breaking polymers into monomers by adding water
fatty acid
insoluble, makes cell membranes, made of lipids
saturated lipid
SOLID at room temp, SINGLE bonds between carbon
Ex: butter
unsaturated lipid
liquid at room temp, DOUBLE bonds between carbon
Ex: olive oil