hello every 1, i have a few questions -i'd like to know what error bars are & how did i plot them on a graph? -can some one please give me a scintific explanation to why small drops of substrate are introduced into a enzyme when trying to find its activity, all i know is that if all the substrate is added to the enzyme all at once, it will be immediately used up, small drops of substrate initiate the reaction but i dont know how? why is insulin refered to as gobular when it has a quatenary structure? and what makes an enzyme so specific, is it its spherical shape? or the nature of the enzyme to have only 1 functional region? how do you calculate the rate of a reaction?