End of test 2 Flashcards
what color is the benidicts solution
blue
how does the benididct solution work?
it is added to an unknown substance and heated
what kind of test is the benidict test?
qualitative test
what are the results for the benidict test?
monosaccharides are green, orange or brown (+)
disaccharides and polysaccharides are blue (-)
what is the test for polysaccharides?
iodine is added to an unknown substance
what is iodine?
brown solution
what is the result of a polysaccharide test?
blue or black for (+) polysaccharides
brown (-) for monosaccharides and disaccharides
what is the purpose of lipids?
gives stored energy, pads organs, insulation under skin
what are the characteristics of lipids?
contains CHO
H:O ratio is greater than 2:1
never dissolve in H2O
what are examples of lipids?
oils (liquid)
waxes (solid)
where is fat found?
the cell membrane
what is the dehydration synthesis for fat?
glycerol+ 3 fatty acids—– lipid+ 3 H2O
what is the hydrolysis reaction for a fat?
lipid+ 3 H2O—- glycerol+ 3 fatty acids
what is glycerol?
an alcohol
how do you know something is an alcohol?
it ends with “ol”
what is the formula for glycerol?
H
|
H-C-OH
|
H-C-OH
|
H-C-OH
|
Hwhat is the formula for a fatty acid?
RCOOH
where does the water come from in the process?
the OH in fatty acid and H in glycerol
what is a saturated fat?
-c-c-
its bad because it only has a single bond and has many places for things to hook on
what is an example of a saturated fat?
butter
what is an unsaturated fat?
not good or bad (eh)
c=c
has 2 bonds so its better
what is a polyunsaturated fat?
good
c=c=c
things cant hook on
what an example of a polyunsaturated fat?
olive oil
what is cholesterol?
clogs arteries, not good
