The reactions of photosynthesis occur in the of plant cells. A. chlorophyll B. lysosomes C. chloroplasts D. mitochondria

it's C- chloroplasts because it occurs in the membrane of the chloroplasts

The answer is C.  Chloroplats

Explanation:

In plants, photosynthesis takes place in chloroplasts, which contain the chlorophyll. Chloroplasts are surrounded by a double membrane and contain a third inner membrane, called the thylakoid membrane, that forms long folds within the organelle.

many other transport proteins, often called pumps, move materials against a concentration gradient. active transport drives molecules across a membrane from a region of lower concentration to a region of higher concentration. this process, shown in figure 5.1, uses transport proteins powered by chemi- cal energy.