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Molecules of life
reveiw for quiz 3
36
Biology
Undergraduate 2
09/13/2011

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Term
the organic molecules in food are used to
Definition
Provide energy for our cells, provide the structural building blocks to make new cells
Term
triglycerides
Definition
fats and oils
Term
Phospholipids
Definition
major component of cell membranes
Term
Steroids
Definition
cholersterol and steroid hormones
Term
lipids are..
Definition
hydrophobic (they do not mix with water)
Term
Saturated fats (triglycerides) generally are _____ at room temperature
Definition
solid
Term
saturated fats usually come from
Definition
Animal sources
Term
Saturated fats can be associated with _____ disease
Definition
cardiovascular
Term
Unsaturated fats (trigylcerides) are usually _______ at room temp
Definition
liquid
Term
Unsaturated fats come from
Definition
plant sources
Term
Triglycerides contain over ____ as many cal/g as cars and protein
Definition
2x
Term
saturation is
Definition
the number of hydrogen atoms attached to each carbon in the m olecule
Term
more saturated fats have
Definition
higher melting points
Term
less saturated fats have
Definition
lower melting points
Term
melting point is
Definition
the temperature at which the mlecule scahrge from a solid to a liquid.
Term
melting point is effected by
Definition
the size of the molecule
and amount of saturation
Term
hydrogenation
Definition
the porcess of increasing the number of hydrogen atoms attached to carbon atoms increasing saturation, in an unsaturated fat
Term
emulsifier
Definition
chemical used to help mix lipids and water
Term
emulsifiers are both _________ and _________
Definition
hydrophonic and hydophilic
Term
Carbohydrates are most
Definition
common fuel for living cells
Term
three groups of Carbohydrates are...
Definition
monosacrides, disaccarides, and polysacharides
Term
monosacharides are the carbohydrate
Definition
monomer
Term
a monosaccride is a
Definition
simple suger
Term
what carboydrate is the building block for other carbohydrates?
Definition
monosachrides
Term
what kind of carbohydrates are these: glucose fructose & galactose
Definition
monosaccrides
Term
disachirides are
Definition
two monosaccarides joined together
Term
disacrides are a ______ sugar
Definition
simple
Term
what type of carbohydrate are these : sucrose and lactose
Definition
disaccrides
Term
polysachatides are
Definition
long change of suger monomers the carbohydrate polymer
Term
polysaccrides are a _________ sugar
Definition
complex
Term
what type of carbohydrate are these : starch and cellulose
Definition
polysacharide
Term
Benidicts reagent reacts and changes color in the presence of ___________ but does not in the presence of __________
Definition
mono or disachrides; polysacchrides
Term
Iodine
Definition
a chemical that reacts and changes color in the presence of starch
Term
proteins serve as_______, some________ and __________ components of tissues
Definition
enzymes; hormones; structural
Term
the building blocks of proteins are called
Definition
amino acids
Term
biuret reagent
Definition
chemical that reacts and changes color in the presence of protein
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