In which part of a plant cell does chlorophyll reside?

Chlorophyll is a green pigment essential for photosynthesis, the process by which plants convert light energy into chemical energy. It is found in the chloroplasts of plant cells. Chloroplasts are specialized organelles that contain the chlorophyll molecules, which are vital for capturing light energy. This energy is then used to convert carbon dioxide and water into glucose and oxygen, which are fundamental to plant survival and growth.

The other options pertain to different components of the plant cell with distinct functions. The nucleus is responsible for storing genetic information and regulating cellular activities, while ribosomes are the sites of protein synthesis. Mitochondria are known as the powerhouses of the cell and are involved in producing energy through the process of cellular respiration. None of these organelles contain chlorophyll or play a role in photosynthesis. Therefore, the chloroplast is the correct and only location where chlorophyll resides in plant cells.