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Cells definitions
all the definitions needed
Question | Answer |
---|---|
what is diffusion? | The movement of a substance from a highly concentrated area to an area of low concentration till the concentrations are even |
What diffuses into a cell? | oxygen and water |
what diffuses out of a cell? | Carbon dioxide |
what is osmosis? | the movement of water from a HWL to a LWC through a selectively permeable membrane |
What happens if we put a plant cell in distilled water? | the vacuole size will increase the cytoplasm, membrane will squish against the cell wall and this plant will look strong. This cell is TURGID |
what happens if we put a plant cell in a strong sucrose solution? | the vacuole size will decrease, the cytoplasm and membrane will move away from the cell wall and the plant will look weak. These cells are FLACCID or PLASMOLYSED |
what is a catalyst? | a catalyst is a chemical that speeds up a reaction |
What is the test for starch/ | iodine solution changes from orange/brown to blue/black |
What is a enzyme? | an enzyme is a biological catalyst |
a substance an enzyme works on is called a ... | substrate |
what is a breakdown reaction? | when one large molecule breaks into smaller molecules |
what is a synthesis reaction? | when 2 smaller molecules bind t make one large molecule |
enzymes are specific what dose this mean? | each one will only bind with on substrate |
What happens to enzymes at very high or low temperatures? | they become inactive and denatured |
The temperature at which and enzyme works best is known as its... | optimum temperature |
each enzyme has a specific........ that is most active at | PH/temperature |