Terms in this set (11)
Movement of molecules from an area of higher concentration to an area of lower concentration.
Diffusion of water through a selectively permeable membrane
specialisation in cells
when a cell adapts to do its job better. for example plant leaf cells have chloroplasts to photosynthesis
single-celled organisms that lack a nucleus; prokaryotes
A cell that contains a nucleus and membrane bound organelles
A unicellular organism that lacks a nucleus and membrane bound organelles
where is the DNA located in prokaryotic cells?
it is in the cytoplasm
When is osmosis used?
when, for example, water and nutrients is transferred through a cell wall
can diffusion happen in pure water?
no; it is only in gasses and dissolved solids
What is the optimum pH for enzymes?
The pH level that they are most active at. E.g., pepsin has an optimum pH of 2
where would a enzyme have a low optimum pH?
The stomach because it is so acidic
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