biology year nine Flashcards
what does the nucleus do ?
the nucleus caries DNA
what does the cell membrane do
it controls what enters and leaves the cell
what do chloroplasts do
its were photo synthesis occurs it has chlorophyll in it witch makes the leaf green
what does the cell wall do
provides strength to a cell
what is the food test for starch
add drops of iodine and then if it goes blue / black then starch is present
whats the food test for glucose
add Benedict solution and put it int a bunsen burner and if it goes brick red then glucose is present
whats the test for protein
add copper sulphate and and sodium hydroxide if it turns purple then protein is present
whats the test for fat
add 2cm of ethanol and 2cm of water and if goes cloudy fat is present
what is a balanced diet
a balanced diet is eating the same amount of food from each food group but try and cut down on fats
what does water do
hydrates the body
what does protein do
groth and repair
what do vitamens and minerals do
to keep body healthy
what does fiber do
for energy and insulation
what do lipids do
energy and insulation
what do carbs do
main source of energy
what are the 3 main enzymes
carbohydrases, proteases, and lipases
what is used when you eat carbs
carbohydrases,
what is used when u eat protien
proteases
what is used when u eat fats
lipases
what do carbohydrases break down into
simple sugars/glucose
what do proteases break down into
amino acids
what do lipases break down into
fatty acids and glycerol
what does the mouth do
breaks down enzymes
what does the oesophagus do
pushis down food using muscles to the stomach
