why do you get cramps if a 'burst' of physical activity is continued for too long?

what are the 3 main ways molecules and ions can move through a membrane?

what is diffusion?

what is active transport?

what increases the rate of diffusion?

what is osmosis?

what is the cell wall of a fungus made of?

what is a bacteria's cell wall made of?

function of the slime capsule

function of the flagella?

function of the plasmids?

what do bacterium have instead of a nucleus?

what is a substrate?

what is the small area on an enzyme's surface called?

how does an enzyme lower the energy needed for a reaction?

what 2 factors effect an enzymes ability?

what is the optimum temperature for an enzyme to work at?

why does a higher temp affect an enzymes ability to work?

what is the optimum pH level for an enzyme?

what happens to an enzyme if the surrounding is on either side of pH7?

which enzyme works best at pH2?

what is respiration?

what two types of energy does glucose release when it is oxidized?

what is chemical energy used for?

what is the word equation for aerobic respiration?

what are the advantages of anerobic respiration?

what are the disadvantages of anaerobic respiration?

when do muscle cells respire anaerobically?

why do muscles respire anaerobically?

what is the word equation for anaerobic respiration

what are the 7 life processes?

what are the 7 life processes?

features of a plant cell

features of an animal cell

function of cytoplasm

function of the nucleus

function of the membrane

function of the mitochindria

function of the cell wall

function of the vacuole

function of the chloroplasts

what controls chemical reactions in cells?

why do we need enzymes?

why are there thousands of different enzymes?