<span>photosynthesis </span>takes place<span> in the mesophyll</span>cells<span>, but </span>carbon fixation<span> (and opening of stomata) </span>takes place<span> at night and the Calvin cycle </span>happens<span> during the day
The carbon fixation occurs in the stroma, which is the colourless fluid that bathes the grana inside the chloroplast. It is in the stroma that the biochemical <span>reactions of reduction take place, one of them being</span><span> </span><span>carbon fixation. This is a light-independent reaction that is part of Calvin cycle. The stroma is where the enzymes that catalyse these reactions can be found.</span>
