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BioChem 1-Final Exam

Cell Stuff & Osmosis, Diffusion, etc.

QuestionAnswer
enzyme: lock as substrate:_____ Key
Structure of Membrane -made of phospholipids -semi permeable membrane (some things get across, but most don't)->very small molecules(uncharged/non-polar) -protein markers -protein channels -carbohydrate markers -cholesterol *bilayer
Proteins in Membrane -channels -signalling -connecting to other cells -structural->cytoskeleton -enzymes -receptors
concentration amount of solute in the solvent
gradient smooth transition from A->B
dynamic equilibrium equal distribution, but movement
diffusion passive moment directly across membrane from [high]->[low]
osmosis diffusion of water
active transport forcing molecules from (low)->(high) using ATP and specialized *build up concentration -storage -rid cell of toxins -increases potential energy
ATP energy from the breaking down of glucose
Facilitated Diffusion transportation/moving large molecules from HIGH->LOW using a protein channel *specific channels for molecules only open when: *conc. gradient changes *voltage changes *receive signal to open
endocytosis/exocytosis endo-into cell exo-out of cell *using membrane to make vesicle around molecule (HIGH)->(LOW) Endo-shrinks membrane Exo-Reverse.
The cell membrane regulates and controls what kind of_____move in and out of the cell. Molecules
When molecules spread from an area of high to low concentration, it is called____. Diffusion
As molecules diffuse, they create a____, which is a difference in concentrations across space. gradient
Cell membranes are____. This means that they only allow certain things to pass through. semi-permeable
A membrane that would allow ANYTHING to pass through it would be called____. permeable
Diffusion is the movement of molecules. Osmosis is the diffusion of____. WATER
____is the process of water molecules moving across a cell membrane. Osmosis
Created by: StudyingGirl
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