PLTW Principles of Biomedical Science: 2.2
Review UPDATED Exam Questions and
CORRECT Answers
glucose, starch, protein, and lipids - CORRECT ANSWER - what are the main nutrients
found in food? (4)
benedict's solution and lugol's iodine - CORRECT ANSWER - how can carbohydrates be
detected in foods? (2)
brown paper bag - CORRECT ANSWER - how can lipids be detected in foods?
bieuret's indicator - CORRECT ANSWER - how can proteins be detected in foods?
glucose/simple sugars - CORRECT ANSWER - what does benedict's solution detect? (2)
aquamarine - CORRECT ANSWER - what does a negative reaction to benedict's solution
look like?
orange - CORRECT ANSWER - what does a positive reaction to benedict's solution look
like?
starch - CORRECT ANSWER - what does lugol's iodine detect?
amber brown - CORRECT ANSWER - what does a negative reaction to lugol's iodine look
like?
black/purple - CORRECT ANSWER - what does a positive reaction to lugol's iodine look
like?
, protein - CORRECT ANSWER - what does bieurets indicator detect?
dark blue - CORRECT ANSWER - what does a negative reaction to bieurets indicator
look like?
purple - CORRECT ANSWER - what does a positive reaction to bieurets indicator look
like?
lipids - CORRECT ANSWER - what do brown paper bags indicate?
doesn't tint paper - CORRECT ANSWER - what does a negative reaction to the brown
paper bag test look like?
transluscent - CORRECT ANSWER - what does a positive reaction to the brown paper
bag test look like?
healthy: fruits unhealthy: cookies, sweets, etc - CORRECT ANSWER - what types of
foods supply sugar? (3ish)
potatoes, pasta, breads, oatmeal, any other complex carbohydrate - CORRECT ANSWER -
what types of foods supply starch? (5)
meat, dairy, legumes (beans, nuts) - CORRECT ANSWER - what types of foods supply
proteins? (3)
oils, butter, meat - CORRECT ANSWER - what types of foods supply lipids? (3)
Review UPDATED Exam Questions and
CORRECT Answers
glucose, starch, protein, and lipids - CORRECT ANSWER - what are the main nutrients
found in food? (4)
benedict's solution and lugol's iodine - CORRECT ANSWER - how can carbohydrates be
detected in foods? (2)
brown paper bag - CORRECT ANSWER - how can lipids be detected in foods?
bieuret's indicator - CORRECT ANSWER - how can proteins be detected in foods?
glucose/simple sugars - CORRECT ANSWER - what does benedict's solution detect? (2)
aquamarine - CORRECT ANSWER - what does a negative reaction to benedict's solution
look like?
orange - CORRECT ANSWER - what does a positive reaction to benedict's solution look
like?
starch - CORRECT ANSWER - what does lugol's iodine detect?
amber brown - CORRECT ANSWER - what does a negative reaction to lugol's iodine look
like?
black/purple - CORRECT ANSWER - what does a positive reaction to lugol's iodine look
like?
, protein - CORRECT ANSWER - what does bieurets indicator detect?
dark blue - CORRECT ANSWER - what does a negative reaction to bieurets indicator
look like?
purple - CORRECT ANSWER - what does a positive reaction to bieurets indicator look
like?
lipids - CORRECT ANSWER - what do brown paper bags indicate?
doesn't tint paper - CORRECT ANSWER - what does a negative reaction to the brown
paper bag test look like?
transluscent - CORRECT ANSWER - what does a positive reaction to the brown paper
bag test look like?
healthy: fruits unhealthy: cookies, sweets, etc - CORRECT ANSWER - what types of
foods supply sugar? (3ish)
potatoes, pasta, breads, oatmeal, any other complex carbohydrate - CORRECT ANSWER -
what types of foods supply starch? (5)
meat, dairy, legumes (beans, nuts) - CORRECT ANSWER - what types of foods supply
proteins? (3)
oils, butter, meat - CORRECT ANSWER - what types of foods supply lipids? (3)
