You would find a cell containing a large number of chloroplasts in a plant cell, specifically in the mesophyll cells of leaves.

Here's why:

* Chloroplasts are the organelles responsible for photosynthesis, the process by which plants convert sunlight into energy.

* Mesophyll cells are the primary site of photosynthesis in leaves. They are located in the middle layer of the leaf and are packed with chloroplasts to maximize their light-gathering and energy-producing abilities.

While other plant cells may contain chloroplasts, the mesophyll cells have the highest concentration due to their specialized function.