The major similarity between chloroplasts and mitochondria is that they produce ATP as their energetic output. Critically, chloroplasts and mitochondria BOTH make significant use of a proton gradient in order to accomplish this (converting a membrane potential into chemical energy). Chloroplasts, however, derive their driving force for the production of ATP (and sugars, but that is beside the point) from the sun. ...
In this solution, we explore in a short essay how mitochondrial and chloroplast function are similar and different in their means of producing energy. Two sources are given for further understanding.