Ch 2 The Chemicals of Life Flashcards
what are the four biomolecules that every organism needs
protein
carbohydrates
fats
vitamins
what are the three types of carbohydrates and their function and sources?
sugar - fast supply of energy/sweets, fizzy drinks
starch- slow supply of energy/ potatoes, rice, pasta
fiber- prevents constipation/ fruit, veg, brown bread
what is the purpose of protein? name two sources
protein is useful fo growth and repair or cells and to
create enzymes.
muscles and hair.
sources- meat,fish, dairy
what is the function of fat in the diet.
name 3 sources
fat provides a store of energy and it insulates and protects internal organs.
sources- meat, dairy, chocolate
what is the function of vitamins. name two sources
vitamins are useful for healthy gums, teeth, joints and immune system
sources- fruit, veg, dairy
what is iodine used for?
iodine is used to test for
starch
orange»_space;> blue black
what is the test for glucose
benedict’s reagent
blue»_space;> red
what is the test for protein?
biuret reagent
blue»_space;» purple
what is used to
test for fats
brown paper
opaque»» translucent
what is the purpose of minerals. give three sources
minerals build biomolecules and assist chemical reactions within cells.
sources- lean meat, fruit, veg, dairy
what is the purpose of water. give sources
water acts as a solvent, helps transport materials in blood, removed waste and regulates body temperature
sources - water, fruit, veg
what is the test for the presence of water
white anhydrous copper sulfate turns blue
what is a balanced diet?
a balanced diet contains all the nutrients in the correct quantities
what is energy in food measured by?
kilojoules and kilocalories
what is a Reference Intake (RI)
The reference intake label provides us with information on the amount of calories and nutrients needed for a healthy diet
