BSC1010L MIDTERM EXAM QUESTIONS AND ANSWERS
WITH COMPLETE SOLUTIONS GRADED A++
lugols test
tests for starch, using the spot plate, reagent color yellowish brown, blue black if starch
is present
grease spot test
test for lipids, used unglazed vrown wrapping paper,reagent color is brown reaction
after dried if lipids are present the paper was transparent ,positive tests were milk and
veggies oil
Sudan IV Test
tests for lipids in test tube, reagent color is red, if lipids are present it binds with lipids to
form drops or floating ring , negative is diluted red milk and oil were positive
Biuret test
test for proteins, blue liquid in test tube then spot plate , reagent color is light blue, violet
in presence of proteins
Ninhydrin Test
free amino acids, round filter paper dryed over hot plate , reagent color is clear , positive
reaction is violet for free amino acids
yellow for amino acids not free
which reagent was used to test for protein?
biuret
WITH COMPLETE SOLUTIONS GRADED A++
lugols test
tests for starch, using the spot plate, reagent color yellowish brown, blue black if starch
is present
grease spot test
test for lipids, used unglazed vrown wrapping paper,reagent color is brown reaction
after dried if lipids are present the paper was transparent ,positive tests were milk and
veggies oil
Sudan IV Test
tests for lipids in test tube, reagent color is red, if lipids are present it binds with lipids to
form drops or floating ring , negative is diluted red milk and oil were positive
Biuret test
test for proteins, blue liquid in test tube then spot plate , reagent color is light blue, violet
in presence of proteins
Ninhydrin Test
free amino acids, round filter paper dryed over hot plate , reagent color is clear , positive
reaction is violet for free amino acids
yellow for amino acids not free
which reagent was used to test for protein?
biuret
