Biology Flashcards
what is diffusion
movement of particles from a high to low concentration
what is active transport
movement of particles from a low to high concentration which requires energy
what is osmosis
movement of water particles from a high to low concentration across semi permeable membrane
what affects the rate of diffusion
temperature, surface area, concentration
if teh surface area is bigger is diffusion faster or slower
the faster the rate of diffusion
what are porteins made of
smaller amino acids
what elements are in proteins
carbon, hydrogen, oxygen and nitrogen
what elements are in carbohydrates
carbon, hydrogen, oxygen
what elemts are in lipids
carbon, hydrogen, oxygen
what is an example of carbohydtares
starch and made of smaller molecules of simple sugars
what are lipids made of
smaller molecules of fatty acids and glycorol
if starch is present what colour is it
blue-black
what do you use to test starch in food
iodine
if glucose is present what colour will it turn
red
does glucose have to be heated in order to tell if its present
yes
if lipids are present what will hapen
the water will be cloudy
what needs to be added to the food if you want to know if lipids are present
water and ethanol
if protein is present what will happen
it will turn purple
what solution do you have to add to the food if you want to know if protein is present
biuret solution
whats the function of carbohydrates
gives you energy
whats the function of protein
for growth and repair
whats the function of lipids
energy store and insulation
whats the function of vitamin A
vision/eyeight
whats the function of vitamin C
teeth/skin
whats the function of vitamin D
to absorb calcium for bones
whats the function of mineral calcium
bone development
whats the function of mineral iron
red blood cells to carry oxygen
whats the function of water
for cells to function
whats the function of fibre
to aid digestive system
