nutrients won
Name the three general types of nutrients other than vitamins & minerals.
carbohydrates lipids proteins
State the difference between fats and oils
At room temperature:
fats are solid
oils are liquid
State the use of carbohydrates in the body
energy
iodine solution is what color ?
amber
orange/brown
Name the solution used to test for starch.
Iodine solution [NOT iodine - the solution is IKI iodine potassium iodide]
Name the elements that make up carbohydrate and lipid molecules.
carbon hydrogen oxygen
name the nutrient most abundant in rice
carbohydrate
State the form of carbohydrates that plants store in their tissues.
starch
Biuret solution is what color ?
light blue
Name the solution used to test for protein.
Biuret
Name the smaller molecule that makes up carbohydrates
glucose
Name the smaller molecule that makes up proteins.
amino acid
Name the elements that make up protein molecules.
carbon hydrogen oxygen nitrogen
What color change confirms the presence of protein in a food sample ?
Name the two liquids used to test for lipids [other than an oil itself]
water ethanol
State the name of three common forms of carbohydrates
starch glycogen cellulose
State the use of protein in the body.
growth and repair. [enzymes]
What form of carbohydrates do humans store ? [in the liver]
glycogen
What is the positive result of a test for lipids ?
A cloudy, milky white emulsion forms.
Name the solution used to test for reducing sugar.
Benedict's solution
State the names of the smaller molecules that make up lipids.
fatty acids glycerol
State the use of lipids in the body.
energy, cell membranes, neurons
Why do carbohydrates, lipids and proteins need to be digested before they can be used by the body, but vitamins and water do not ?
Carbohydrates, lipids and proteins are too large to pass through the gut wall and must be digested first. Vitamins and waterare small enough to pass through the wall of the intestine without being broken down.
What indicates a positive test result for reducing sugar ?
A positive test result is a color change somewhere along a color scaleblue (no reducing sugar)
green (trace amount)
yellow/orange (small amount)
brown/brick-red (a high concentration)
What is different about the type of results obtained by the test for reducing sugars than th tests for proteins, lipids and carbohydrates ?
The type of results obtained by the test for reducing sugars are QUALITATIVE. The results indicate HOW MUCH sugar there is, not just whether there is sugar present. The tests for proteins, lipids and carbohydrates only indicate the presence of the nutrient, not the amount.