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20 terms

Biochemistry and the digestive system

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lock and key model
The model of the enzyme that shows the substrate fitting perfectly into the active site is called the
Biuret's test
test for proteins positive-if it turns purple
Benedict's test
Tests for presence of carbohydrates, changes blue to red when heated
iodine test
tests for starch result: turns sample Blue/Black if starch is present
Lipids test
rub in on a peice of brown paper bag and rub it in....if you can see through then its fatty
functions of lipids
1. membrane structure; 2. energy storage; 3. hormones; 4. vitamins, second source of energy, insulate the body, protects the internal organs
fatty acids
A long carbon chain carboxylic acid. Fatty acids vary in length and in the number and location of double bonds; three fatty acids linked to a glycerol molecule form fat.
hydrophobic
lacking affinity for water
hydrophilic
having a strong affinity for water
saturated fats
animal products, meat butter cheese and in palm and coconut oils. May elevate blood cholesterol.
Unsaturated fats
plan products such as vegetable oil, nuts,m and seeds, and in fish. Unsaturated fats tend to lower blood cholesterol levels
Dog
a member of the genus Canis (probably descended from the common wolf) that has been domesticated by man since prehistoric times
cat
feline mammal usually having thick soft fur and being unable to roar
horse
solid-hoofed herbivorous quadruped domesticated since prehistoric times
eminem
A famous rapper who rose to fame rapping on the roughs of his childhood. He is one of the only white rappers in the world, his reall name is Marshal mathers, in which he used to get the initals M&M, later Eminem, and then knewly called Slim Shady.
Glycerol
Three-carbon compound with three hydroxyl groups; component of fats and oils.
Triglycerides
long term energy storage molecules formed during condensation synthesis between 3 fatty acids and one molecule of glycerol
phospholipids
A molecule that is a constituent of the inner bilayer of biological membranes, having a polar, hydrophilic head and a nonpolar, hydrophobic tail.
waxes
type of structural lipid; long fatty acids chain bonded to long alcohol chain; highly waterproof; in plants and animals.
steroids
lipids whose carbon skeleton is bent to form four fused rings. These all have the same ring pattern: three six-sided rings and one five-sided ring.