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What are the two characteristics of a molecule that will keep it from passing through a membrane and how does each keep the molecule from passing through?
Wiki User
∙ 14y ago
size and polarity
Wiki User
∙ 14y ago
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Describe how the diffusion of ions across a cell membrane differs from the diffusion of nonpolar molecules across the cell membrane?
Ions need to be facilitated through a cell membrane because they are passing through a phospholipid bilayer with a hydrophobic interior. Non polar molecules are also hydrophobic, so they can pass through the membrane easily if they are small enough. Ions are polar, so they have a hard time passing through membranes.
Why is the passing into and out of a cell tHROUGH the cell membrane important?
im trying too hun
How water molucleus move through the cell membrane doing out mosis?
During osmosis, water molecules move through the cell membrane by passing through microscopic openings in the membrane. The openings are large enough for the water molecules to pass through.
Molecules A and B come in contact with the cell membrane of the same cell Molecule A passes through the cell membrane readilybut molecule B does not Which statement could describe molecules A an?
molecule A is a SImple Sugar WHile B Is Starch
Does sugar diffuse through the cell membrane?
No. Only non-polar, small molecules can pass through a membrane by simple diffusion. A sucrose molecule is too large a molecule to pass through a membrane by simple diffusion, however, it can pass through a plasma membrane (but not any artificial membranes like Visking tubings) by facilitated diffusion, i.e. through transport proteins(specific carriers for sucrose) embedded in the membranes. ! =)
What are two characteristics of a molecule that will keep it from passing through a membrane and how does each keep the molecule from passing through?
size and polarity
Can all molecules diffuse through all cell membranes?
No, there are specific cell membranes that allow only certain molecules to pass through. Some stay open and others must be opened ( like a gate ).
Can a protein go through the cell membrane?
Glycogen has a had time passing through a cell membrane in comparison to water.
What happens if a molecule is too large to go through a membrane?
The molecule will be transported across the membrane by way of a transport protein or protein channel.
How can water go through the cell membrane when it is polar?
Because it is a small molecule, water can diffuse through the cell membrane.
What separated water?
Passing electricity a through a molecule of water
What is the process of dissolved food passing through a cell membrane?
Diffusion
How does sodium ion molecule move into the cell through cell membrane?
Through diffusion.
Can an ATP molecule can pass through semipermeable membrane?
your fat cow
What is a diffused molecule from a semipermeable membrane?
What is the situation? Provided a concentration gradient and a molecule that passes through a membrane, diffusion will happen. Generally small and nonpolar molecules will pass through a membrane down a concentration gradient. That doesn't answer your question but it may be the answer your looking for.
How do solute molecules pass through the membrane?
The solute molecule, when passing through the membrane passively using a carrier protein, is called the substrate. The solute, or substrate will bind to the carrier protein from the outside, the carrier protein changes conformation, and the substrate is exposed to the inside of the membrane.
What prevents ions and most large molecules from passing through the membrane?
vacuoles
