Animal cells are different, they do not have cell walls. If one of your cells is placed in distilled water it will swell up and burst. Plant cells also contain chloroplasts. These contain a green chemical called chlorophyll. Chlorophyll is necessary for photosynthesis.
Some people think that chloroplasts are like bacteria.
This DNA is used to control how chloroplasts work. They need the information in the DNA to make their own enzymes which they need for photosynthesis. Animal cells never contain chloroplasts. Most of the space inside a plant cell is filled with cell sap in a large vacuole. Animal cells never contain large vacuoles.