What is the importance of enzymes in terms of energy levels for a reaction to take place?

For a reaction to happen, the starting molecule(s) have to collide in just the right way. Like all catalysts, enzymes increase the rate of chemical reactions by lowering the reaction's activation energy. Activation energy is the energy needed for the reaction to proceed

i hope this helps :) and sorry if its wrong i had someone help me ;(

a axis of a graph is a color or shade so we can all go outside and have a party so we can eat   some grilled cheese sammiches and broccoli and have some ugly fun times

i don't know why i put this, i know its not the i was just bored : p

delete this answer while you can

photosynthesis makes the glucose that is used in cellular respiration to make atp. the glucose is then turned back into carbon dioxide, which is used in photosynthesis. while water is broken down to form oxygen during photosynthesis, in cellular respiration oxygen is combined with hydrogen to form water.