| Term | Definition |
|
cell |
the most basic unit of life on earth |
|
prokaryote |
organism made up of a single cell that does not have a nucleus |
|
eukaryote |
organism made of a cell or cells that have a nucleus |
|
cytoplasm |
gel like material that fills a cell |
|
organelle |
membrane bound structure inside a cell that performs a specific function |
|
cell membrane |
thin layer made of fat that surrounds every cell |
|
nucleus |
organelle that contains DNA |
|
mitochondria |
organelles that break down sugars and use the energy to make ATP |
|
chloroplast |
organelle in plant cells that convert the energy in sunlight into sugars |
|
chlorophyll |
green pigment in plants that absorbs light energy used to carry out photosynthesis |
|
photosynthesis |
process where energy in sunlight is used to make sugars |
|
thylakoid |
site of photosynthesis inside chloroplasts |
|
respiration |
process where cells use the energy contained in sugars to make ATP |
|
ATP |
molecule cells break down to free the energy they need to live |
|
ATP Synthase |
enzyme that builds ATP molecules |
|
gradient |
difference in concentration between two points |
|
concentration |
amount of particles in a given volume |
|
diffusion |
movement of particles from an area of high concentration to an area of lower concentration |
|
osmosis |
the diffusion of water across a membrane |
|
semi-permeable |
when some things can pass through a membrane and others cant |