Insulin is a protein that is used by the body to regulate both carbohydrate and fat metabolism. a bottle contains 525 ml of insulin at a concentration of 30.0 mg/ml . what is the total mass of insulin in the bottle?

Johnny rode his bike to a friend's house 4 blocks down the street in his neighborhood. he immediately rode back home once he realized his friend was not able to play. what was his displacement for the total bike ride? how did you determine this? what could we use as a reference point to determine he was in motion during his bike ride? why can you use it as a reference point

Which of these parts of the membrane large moecules pass through it ?

Which particle controls what element an atom is?