click below
click below
Normal Size Small Size show me how
biology test
cell functions
| Question | Answer |
|---|---|
| mitochondria | site of atp (energy) production |
| nucleus | control center of the cell, contains DNA |
| vacuole | stores waste, water and other substances |
| golgi apparatus | sorts and packages proteins |
| lysosome | digest foreign substances and old orgnells |
| smooth ER | synthesizes lipids |
| ribosomes | protein synthesis |
| centrioles | formation of spindle fibers during cell reproduction |
| nucleolues | site of ribosome syntheisis; found in the nucleus |
| rough ER | contains ribosomes; that synthesize and secrete proteins for export |
| cell (plasma) membrane | the 'skin' of the cell allows substances to move in and out of the cell |
| chloroplasts | converts sun's energy into food (sugar) or chemical energy |
| cytoskeleton | supports the shape of the cell and the cell's movement |
| what are the three componts of cytoplasm | cytocil/orgnalls/inclusions |
| why are cristae important to the mitochondria | folds in the mitochandria increse the surface area to maximise the production of ATP |
| state five ways that substances pass thru the cell membrane | 1. ossimosis 2. diffusion 3. active transport 4. facilited diffusion 5. vesciles(transport large subatances |
| which ways of moving substances uses a lot of energy | active transport |
| what is the function of proteins in the cell membrane | to carry substance across the membrane |
| what is active transport | when a cell moves material moves aginst the concration gradient |
| what is the concentration gradient | the diffrence between the high point and the low point |
| hypotonic | lower than sloution |
| hypertonic | above the sloution |
| isotonic | equal to the sloution |
| what is the main way active transport is diffrent than diffusion | diffusion- high to low active transport- low to high |
| what is cell theory | fundemental concept of biology |
| what are the three concepts that make up cell theory | 1. all living orgnisms are made up of cells 2. the structure defines the function 3. new cells are formed from old cells |
| what is an orgenell | structure inside the cell that has a specific function |
| what is the function of the nucleus? | to control the functions and movements of the cell |
| what important molecules do the nucleus contain? | the cells contain DNA |
| what graniluar material is visible within the nucleus? | chromatin |
| what does chromitan consist of? | chromitain consits of DNA bound protein |
| what are chrosomes? | are the gentic make up of the cell and are what get passed down through diffrent genrations of cells |
| most nuclei contain a small, dense region known as the what? | nuclols |
| what is the nuclear envlope | is made of the nuclear membrane and the nuclear pores |
| what are ribosomes | small particles of RNA and protein found throught the cytoplasm and the ribosomes that are attached to the rough ER produces proteins to be sent outside of the cell and the free floating ribosomes are making proteins for inside the cell |
| what are vocuoles | structures that store materials such as waste, protein and water |
| what is the role of the vacuole in the plant cell | the main role is to store the enegry from the sun until it can be converted into food |
| what is the mitochondria | orgennls that convert energy into food ar ATP |
| where are chlorpasts found | in plant cells |
| what is the cytoskelton | structure in the cell that supports cell movement |