Which of the following is NOT an organelle found in animal and plant cells?

Chloroplasts are the organelles responsible for photosynthesis in plant cells, allowing them to convert light energy into chemical energy in the form of glucose. Since chloroplasts contain chlorophyll, they are instrumental in capturing sunlight and are specifically found in plants and some protists, but not in animal cells.

In contrast, centrioles, the cell membrane, and lysosomes are found in both animal and plant cells. Centrioles are involved in cell division and organizing microtubules, the cell membrane acts as a protective barrier and regulates the movement of substances into and out of the cell, and lysosomes contain digestive enzymes for breaking down waste materials. Therefore, chloroplasts are distinct to plant cells, making them the correct response to the question regarding which structure is not found in both types of cells.