Science Quiz / Membrane Structure and Function

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Can you name the Membrane Structure and Function?

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Question Answer
________ _________ penetrate the hydrophobic core of the lipid bilayer and the hydrophobic regions of an integral protein consist of one or more stretches of nonpolar amino acids.
________ _________ are not embedded in the lipid bilayer at all; they are appendages loosely bound to the surface of the membrane.
________ _________ is when membrane proteins of adjacent cells may hook together in various kinds of junctions, such as gap junctions or tight junctions.
_______ ___________ is when some glycoproteins serve as identification tags that are specifically recognized by other cells.
_________ __________ function by having a hydrophilic channel that certain molecules or atomic ions use as a tunnel through the membrane.
The passage of water molecules through the membrane in certain cells is greatly facilitated by channel proteins known as ___________
The diffusion of a substance across a biological membrane is called _________ ___________ because the cell does not have to expend energy to make it happen.
Question Answer
If a cell without a wall is immersed an environment that is ________ to the cell, there will be no net movement of water across the plasma membrane.
If a solution is _________ to the cell, the solution has more solutes than the cell and the cell will lose water to its environment, shrivel, and probably die.
If a solution is _________ to the cell, the solution has a lower solute concentration and therefore water will enter the cell faster than it leaves, and the cell will swell and lys
___________ is the control of water balance.
Another group of channels are called ____ channels, many of which function as gated channels; a stimulus causes them to open or close.
_______ _________ is when the cell must expend energy because pumping a molecule across a membrane against its gradient requires a work.
________ __________ is the charge difference between a cell’s cytoplasm and the extracellular fluid, due to the differential distribution of ions.
Question Answer
A transport protein that generates voltage across a membrane is called an __________ _____.
A single ATP-powered pump that transports a specific solute can indirectly drive the active transport of several other solutes in a mechanism called __________.
__________ is when the cell secretes macromolecules by the fusion of vesicles with the plasma membrane.
In __________, the cell takes in macromolecules and particular matter by forming new vesicles from the plasma membrane.
A ________ is the general term for any molecule that binds specifically to a receptor site of another molecule.

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