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What molecule uses energy to push molecules through the membrane of a cell?
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∙ 11y ago
Transport Protein
Wiki User
∙ 11y ago
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A special molecule that uses energy to push molecules through a membrane of a cell is called?
Transport protein
What molecule is produced as a result of the hydrogen leaking back through the membrane?
Many molecules can be synthesized using that energy. Most important one is ATP
How do cells transport molecules across a cell membrane?
Molecules can move through the membrane in many ways. If the molecule is hydrophobic (or lipophilic) it can easily pass through the membrane. Other than that, most molecules move through the membrane through channels (which flow towards the molecules concentration gradient) or pumps (which flow against a molecules concentration gradient using energy).
How do other molecules pass through the selectively permeable cell membrane?
[Molecules pass through the cell membrane] through a process known as osmosis. ------------------------------------------------------- Yes, osmosis is a great part of diffusion of molecules, but another important factor to consider is the presence of protein channels in the membrane. The cell membrane is actually a lipid bilayer, in which proteins are embedded. Normally, molecules will simply be diffused through these chanells, but in some cases, the protein must be modified in order to allow the molecules to flow. This is called active transport, which requires energy in order to change the shape of the protein and allow the foreign molecule to pass.
Which requires the use of energy to move a molecule across a cell membrane?
No. Water molecules can osmotically cross the cell membrane because they are small enough that their polarity does not matter. Then there are porins. Channels across the cell membrane that water molecules use.
A special molecule that uses energy to push molecules through a membrane of a cell is called?
Transport protein
What molecule is produced as a result of the hydrogen leaking back through the membrane?
Many molecules can be synthesized using that energy. Most important one is ATP
Assisted transport of a molecule across the cell membrane without an expenditure of energy is known as?
Any movement of molecules into or out of a cell without the expenditure of energy is called diffusion. If the molecule uses special channels to diffuse through the membrane (again, not expending energy), it is called facilitated diffusion.
How do cells transport molecules across a cell membrane?
Molecules can move through the membrane in many ways. If the molecule is hydrophobic (or lipophilic) it can easily pass through the membrane. Other than that, most molecules move through the membrane through channels (which flow towards the molecules concentration gradient) or pumps (which flow against a molecules concentration gradient using energy).
How does the size of molecules affect diffusion?
The larger the molecule, the slower the rate of the osmosis; and the smaller the molecule, the slower the rate of osmosis.
What is the movement of molecules through a cell membrane requiring energy?
active transport
How do other molecules pass through the selectively permeable cell membrane?
[Molecules pass through the cell membrane] through a process known as osmosis. ------------------------------------------------------- Yes, osmosis is a great part of diffusion of molecules, but another important factor to consider is the presence of protein channels in the membrane. The cell membrane is actually a lipid bilayer, in which proteins are embedded. Normally, molecules will simply be diffused through these chanells, but in some cases, the protein must be modified in order to allow the molecules to flow. This is called active transport, which requires energy in order to change the shape of the protein and allow the foreign molecule to pass.
Which requires the use of energy to move a molecule across a cell membrane?
No. Water molecules can osmotically cross the cell membrane because they are small enough that their polarity does not matter. Then there are porins. Channels across the cell membrane that water molecules use.
Using an example explain what is meant by a partially permeable membrane?
A membrane that allows some things to pass through it but not others. It can be to do with size of the molecule, electronic charge or other characteristics. Think of a sieve or colander as an example of the semi-permeable membrane and a mixture of sand and peas as the chemical mixture at one side of the membrane. The membrane will only allow the sand to pass through based on size. In cases such as this, larger molecules could pass through active transport channels and such that may be present on the membrane but these are energy-dependant whereas diffusion across a semi-permeable membrane is not.
Why is energy required for facilitated diffusion?
because those that can't get through the membrane by themselves can get help. transport proteins give them a ride through the membrane. different transport proteins make it easier for certain molecules to get through the membrane without cell using energy
What is is when a molecule moves across a membrane through a protein channel without using energy?
Passive Transport
What is it called when a molecule moves a membrane through a protein channel without using energy?
passive transport
