PLTW BIOMEDICAL SCIENCE REVISED YEAR 2025
GRADED A+ NEW EDITION EXAM
glucose, starch, protein, and lipids - what are the main nutrients found in food? (4)
benedict's solution and Lugol’s iodine - how can carbohydrates be detected in foods? (2)
brown paper bag - how can lipids be detected in foods?
biuret’s indicator - how can proteins be detected in foods?
glucose/simple sugars - what does benedict's solution detect? (2)
aquamarine - what does a negative reaction to benedict's solution look like?
orange - what does a positive reaction to benedict's solution look like?
starch - what does Lugol’s iodine detect?
amber brown - what does a negative reaction to Lugol’s iodine look like?
black/purple - what does a positive reaction to Lugol’s iodine look like?
protein - what does biurets indicator detect?
dark blue - what does a negative reaction to biurets indicator look like?
purple - what does a positive reaction to biurets indicator look like?
lipids - what do brown paper bags indicate?
doesn't tint paper - what does a negative reaction to the brown paper bag test look like?
, translucent - what does a positive reaction to the brown paper bag test look like?
healthy: fruits unhealthy: cookies, sweets, etc - what types of foods supply sugar? (3ish)
potatoes, pasta, breads, oatmeal, any other complex carbohydrate - what types of foods supply
starch? (5)
meat, dairy, legumes (beans, nuts) - what types of foods supply proteins? (3)
oils, butter, meat - 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 - how can food labels be used to evaluate dietary choices?
calories, serving size, DVI, vitamins, minerals, fats, proteins, cholesterol, sodium, sugar,
carbohydrates, fibre - what type of information does a food label give a consumer? (12)
vitamins, minerals, proteins, fibre, complex carbohydrates, whole grains - what nutrients should you
maximize in your diet? (6)
fats and sugars - what nutrients should you minimize in your diet? (2)
trans fats - what nutrient should you avoid in your diet?
aids in digestion/cleansing - what role does fibre play in the function of the human body? (2)
provides instant and stored energy - what role does sugar (glucose) play in the function of the human
body? (2)
structure, storage, transport, defence, enzymes, muscles, cell recognition - what role does protein
play in the function of the human body? (7)
GRADED A+ NEW EDITION EXAM
glucose, starch, protein, and lipids - what are the main nutrients found in food? (4)
benedict's solution and Lugol’s iodine - how can carbohydrates be detected in foods? (2)
brown paper bag - how can lipids be detected in foods?
biuret’s indicator - how can proteins be detected in foods?
glucose/simple sugars - what does benedict's solution detect? (2)
aquamarine - what does a negative reaction to benedict's solution look like?
orange - what does a positive reaction to benedict's solution look like?
starch - what does Lugol’s iodine detect?
amber brown - what does a negative reaction to Lugol’s iodine look like?
black/purple - what does a positive reaction to Lugol’s iodine look like?
protein - what does biurets indicator detect?
dark blue - what does a negative reaction to biurets indicator look like?
purple - what does a positive reaction to biurets indicator look like?
lipids - what do brown paper bags indicate?
doesn't tint paper - what does a negative reaction to the brown paper bag test look like?
, translucent - what does a positive reaction to the brown paper bag test look like?
healthy: fruits unhealthy: cookies, sweets, etc - what types of foods supply sugar? (3ish)
potatoes, pasta, breads, oatmeal, any other complex carbohydrate - what types of foods supply
starch? (5)
meat, dairy, legumes (beans, nuts) - what types of foods supply proteins? (3)
oils, butter, meat - 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 - how can food labels be used to evaluate dietary choices?
calories, serving size, DVI, vitamins, minerals, fats, proteins, cholesterol, sodium, sugar,
carbohydrates, fibre - what type of information does a food label give a consumer? (12)
vitamins, minerals, proteins, fibre, complex carbohydrates, whole grains - what nutrients should you
maximize in your diet? (6)
fats and sugars - what nutrients should you minimize in your diet? (2)
trans fats - what nutrient should you avoid in your diet?
aids in digestion/cleansing - what role does fibre play in the function of the human body? (2)
provides instant and stored energy - what role does sugar (glucose) play in the function of the human
body? (2)
structure, storage, transport, defence, enzymes, muscles, cell recognition - what role does protein
play in the function of the human body? (7)
