cytoplasm Jelly-like substance that fills the inside of the cell body, holding organelles in place. mitochondrion Shaped like a bean, this cell organelle helps take food and manufacture energy from it. nucleus the main brain of the cell that contains most of the cell's DNA. vacuole storage areas of the cell known for storing mostly water and/or food. cell membrane The enclosure of the cell that provides the body for all the organelles. cell wall Mostly made of cellulose, this is the tough and rigid outer layer of plant cells. chlorophyll the green (in color) pigment found in chloroplasts where photosynthesis takes place. chloroplast an egg shaped body that appears green from all the chlorophyll they contain. This organelle is where photosynthesis takes place. Key Above cytoplasm Shaped like a bean, this cell organelle helps take food and manufacture energy from it. mitochondrion Mostly made of cellulose, this is the tough and rigid outer layer of plant cells. nucleus An egg shaped body that appears green from all the chlorophyll they contain. This organelle is where photosynthesis takes place. vacuole Jelly-like substance that fills the inside of the cell body, holding organelles in place. cell membrane The main brain of the cell that contains most of the cell's DNA. cell wall Storage areas of the cell known for storing mostly water and/or food. chlorophyll the green (in color) pigment found in chloroplasts where photosynthesis takes place. chloroplast The enclosure of the cell that provides the space for all the organelles.