Biochemistry and the digestive system

20 terms by tands

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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.

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