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What substances moves across the cell membrane with the help or carrier molecules?
Wiki User
∙ 11y ago
Ions across a cell membrane. It is a form of passive transport. Ions such as sodium(Na+), potassium (K+), calcium (Ca2+), and chloride (Cl-). Each ion channel is usually specific for one type of ion.
Wiki User
∙ 13y ago
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Are carrier proteins specific in their action?
Yes, carrier proteins are specific for the substances they transport across the plasma membrane.
In what type of passive cell membrane transport do carrier proteins combine with specific molecules to assist them across the membrane?
Facilitated Diffusion
What is the purpose of transport for proteins?
Carrier proteins are proteins involved in the movement of ions, small molecules, or macromolecules, such as another protein, across a biological membrane. Carrier proteins are integral membrane proteins; that is, they exist within and span the membrane across which theytransportsubstances.
What role do carrier protein play in facilitated diffusion?
it moves large molecules or molecules that are not soluble in lipids across across the cell membrane. (Pg. 101 in science book...1st para.)
What kinds of molecules freely diffuse across a semipermeable membrane?
Water molecules freely diffuse across a semipermeable membrane.
What are two roles of the membrane proteins?
There are two main roles of the membrane proteins. Membrane proteins act as channels across the lipid bilayer. They also act as carrier molecules that transfer substances across the membrane.
How does a protein transport substances across a cell membrane?
carrier protein
Are carrier proteins specific in their action?
Yes, carrier proteins are specific for the substances they transport across the plasma membrane.
How do carriers proteins facilitate passive transport of molecules across a membrane?
Carrier proteins facilitate passive transport of molecules across a membrane by changing its shape, by using ATP, to allow a substance to pass through the membrane.
How is facilitated diffusion differing from diffusion?
Simple diffusion allows non-polar molecules to pass through and a little amount of H20. On the other hand, Facilitated diffusion allows ions and polar molecules across the membrane because it contains carrier proteins. It is highly specific to substances it diffuses across the membrane.
In what type of passive cell membrane transport do carrier proteins combine with specific molecules to assist them across the membrane?
Facilitated Diffusion
What is the purpose of transport for proteins?
Carrier proteins are proteins involved in the movement of ions, small molecules, or macromolecules, such as another protein, across a biological membrane. Carrier proteins are integral membrane proteins; that is, they exist within and span the membrane across which theytransportsubstances.
How do carrier protiens transport substances across cell membrane?
1-A carrier prrotein binds to a molecule on one side of the cell membrane. 2-The carrier protein changes shape,shielding the molecule from the interior membrane. 3-The molecule is released on the other side of the membrane.
What role do carrier protein play in facilitated diffusion?
it moves large molecules or molecules that are not soluble in lipids across across the cell membrane. (Pg. 101 in science book...1st para.)
What are the main characteristics of facilitated diffusion?
both require special carrier molecule to move substances across the membrane
Process when large molecules food and other substances are packaged and moved across the membrane?
bulk transport
Which is a factor that determies whether a mole can cross a cell membrane?
Lipid solubility determines if it will diffuse across. The presence of specific protein carrier molecules determines if it will be transported across the membrane.
