PLTW Principles of Biomedical Science:
2.2 Review Exam Questions and
Answers
glucose, starch, protein, and lipids - Correct Answers -what are the main nutrients found
in food? (4)
benedict's solution and lugol's iodine - Correct Answers -how can carbohydrates be
detected in foods? (2)
brown paper bag - Correct Answers -how can lipids be detected in foods?
bieuret's indicator - Correct Answers -how can proteins be detected in foods?
glucose/simple sugars - Correct Answers -what does benedict's solution detect? (2)
aquamarine - Correct Answers -what does a negative reaction to benedict's solution
look like?
taking a water molecule out of two molecules to create a bond - Correct Answers -what
is dehydration synthesis?
stores energy - Correct Answers -what role does dehydration synthesis play in
harnessing energy from food?
inserting a water molecule into two bonded molecules to break the bond - Correct
Answers -what is hydrolysis?
releases energy - Correct Answers -what role does hydrolysis play in harnessing energy
from food?
calories - Correct Answers -how is the amount of energy in a food determined?
amount of energy needed to raise one gram of water by 1 degree celsius - Correct
Answers -what is the definition of a chemistry calorie?
orange - Correct Answers -what does a positive reaction to benedict's solution look like?
, starch - Correct Answers -what does lugol's iodine detect?
amber brown - Correct Answers -what does a negative reaction to lugol's iodine look
like?
black/purple - Correct Answers -what does a positive reaction to lugol's iodine look like?
protein - Correct Answers -what does bieurets indicator detect?
dark blue - Correct Answers -what does a negative reaction to bieurets indicator look
like?
purple - Correct Answers -what does a positive reaction to bieurets indicator look like?
lipids - Correct Answers -what do brown paper bags indicate?
doesn't tint paper - Correct Answers -what does a negative reaction to the brown paper
bag test look like?
transluscent - Correct Answers -what does a positive reaction to the brown paper bag
test look like?
healthy: fruits unhealthy: cookies, sweets, etc - Correct Answers -what types of foods
supply sugar? (3ish)
potatoes, pasta, breads, oatmeal, any other complex carbohydrate - Correct Answers -
what types of foods supply starch? (5)
meat, dairy, legumes (beans, nuts) - Correct Answers -what types of foods supply
proteins? (3)
oils, butter, meat - Correct Answers -what types of foods supply lipids? (3)
food labels can be used to evaluate the amount of nutrients and unhealthy molecules
you consume in one day - Correct Answers -how can food labels be used to evaluate
dietary choices?
calories, serving size, DVI, vitamins, minerals, fats, proteins, cholesterol, sodium, sugar,
carbohydrates, fiber - Correct Answers -what type of information does a food label give
a consumer? (12)
vitamins, minerals, proteins, fiber, complex carbohydrates, whole grains - Correct
Answers -what nutrients should you maximize in your diet? (6)
fats and sugars - Correct Answers -what nutrients should you minimize in your diet? (2)
2.2 Review Exam Questions and
Answers
glucose, starch, protein, and lipids - Correct Answers -what are the main nutrients found
in food? (4)
benedict's solution and lugol's iodine - Correct Answers -how can carbohydrates be
detected in foods? (2)
brown paper bag - Correct Answers -how can lipids be detected in foods?
bieuret's indicator - Correct Answers -how can proteins be detected in foods?
glucose/simple sugars - Correct Answers -what does benedict's solution detect? (2)
aquamarine - Correct Answers -what does a negative reaction to benedict's solution
look like?
taking a water molecule out of two molecules to create a bond - Correct Answers -what
is dehydration synthesis?
stores energy - Correct Answers -what role does dehydration synthesis play in
harnessing energy from food?
inserting a water molecule into two bonded molecules to break the bond - Correct
Answers -what is hydrolysis?
releases energy - Correct Answers -what role does hydrolysis play in harnessing energy
from food?
calories - Correct Answers -how is the amount of energy in a food determined?
amount of energy needed to raise one gram of water by 1 degree celsius - Correct
Answers -what is the definition of a chemistry calorie?
orange - Correct Answers -what does a positive reaction to benedict's solution look like?
, starch - Correct Answers -what does lugol's iodine detect?
amber brown - Correct Answers -what does a negative reaction to lugol's iodine look
like?
black/purple - Correct Answers -what does a positive reaction to lugol's iodine look like?
protein - Correct Answers -what does bieurets indicator detect?
dark blue - Correct Answers -what does a negative reaction to bieurets indicator look
like?
purple - Correct Answers -what does a positive reaction to bieurets indicator look like?
lipids - Correct Answers -what do brown paper bags indicate?
doesn't tint paper - Correct Answers -what does a negative reaction to the brown paper
bag test look like?
transluscent - Correct Answers -what does a positive reaction to the brown paper bag
test look like?
healthy: fruits unhealthy: cookies, sweets, etc - Correct Answers -what types of foods
supply sugar? (3ish)
potatoes, pasta, breads, oatmeal, any other complex carbohydrate - Correct Answers -
what types of foods supply starch? (5)
meat, dairy, legumes (beans, nuts) - Correct Answers -what types of foods supply
proteins? (3)
oils, butter, meat - Correct Answers -what types of foods supply lipids? (3)
food labels can be used to evaluate the amount of nutrients and unhealthy molecules
you consume in one day - Correct Answers -how can food labels be used to evaluate
dietary choices?
calories, serving size, DVI, vitamins, minerals, fats, proteins, cholesterol, sodium, sugar,
carbohydrates, fiber - Correct Answers -what type of information does a food label give
a consumer? (12)
vitamins, minerals, proteins, fiber, complex carbohydrates, whole grains - Correct
Answers -what nutrients should you maximize in your diet? (6)
fats and sugars - Correct Answers -what nutrients should you minimize in your diet? (2)
