Biological Molecules - Tests Flashcards
what solution is used to test for starch
iodine
if starch is present what colour will the solution go
blue-black
what solution do we use to test for proteins
biurets solution
if protein is present what colour will the solution go
lilac
what solution do we use to test for lipids
ethanol
what else do we add to the solution to test for lipids
water
what must you do to the lipid testing solution
shake it
if lipids are present what colour will the solution go
white cloudy emulsion
what are the 2 different categories of sugars
reducing and non reducing
what is the definition of a reducing sugar
they can donate an electron to another molecule
give an example of a reducing sugar
all monosaccharides
what solution do we use to test for reducing sugars
benedicts solution
what must we do after adding benedicts to our reducing sugar sample
place the test tube in boiling water for 5 mins
if a reducing sugar is present what colour does the solution go
a brick red precipitate forms
give an example of a non reducing sugar
sucrose