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What substances would most likely require a protein to facilitate its diffusion across a cell membrane?
Wiki User
∙ 12y ago
Quick answer: glucose
Explanation: Any substance that the membrane selects against requires integral proteins to cross the membrane. B/c the lipid bilayer is selectively permeable, not all substances can pass through it by diffusion or osmosis. However, when the cell requires a substance that it's membrane does not easily allow to pass through, it must enter via the proteins in the membrane. They can either be carrier proteins or protein channels depending on the substance. One example of a substance which requires facilitated diffusion is glucose.
Wiki User
∙ 13y ago
Large molecules such as glucose or amino acids would most likely require a protein to facilitate their diffusion across a cell membrane. These molecules are too big or polar to pass through the lipid bilayer of the membrane on their own, so specific transporter proteins are needed to aid in their movement.
Wiki User
∙ 12y agoFatty acid
Wiki User
∙ 9y agoamino acids
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Movement of substances from higher to lower concentration across a semipermeable membrane that must have a specific protein carrier but no energy expenditure is called?
Facilitated diffusion is the movement of substances from higher to lower concentration across a semipermeable membrane with the help of specific protein carriers, without requiring energy input.
A molecule such as glucose must use a protein channel to cross through a cell membrane?
This is correct. Glucose, being a large molecule, requires a protein channel called a glucose transporter to facilitate its passage through the cell membrane. Glucose transporters assist in transporting glucose molecules across the hydrophobic lipid bilayer of the cell membrane.
What protein is an integral membrane protein that helps move molecules across a cell membrane?
An example of an integral membrane protein that helps move molecules across a cell membrane is a transporter protein. These proteins are embedded within the lipid bilayer and facilitate the movement of specific molecules such as ions or metabolites across the membrane through a process called facilitated diffusion or active transport.
Which type of transport occurs when a membrane protein binds to a molecule on one side of the cell membrane and then releases it on the other side?
Facilitated diffusion occurs when a membrane protein binds to a molecule on one side of the cell membrane and then releases it on the other side. This type of transport does not require energy and relies on the concentration gradient to move molecules across the membrane.
What is something called that moves a substance into and out of a cell in facilitated diffusion called?
A membrane protein known as a transporter or carrier protein moves substances into and out of cells in facilitated diffusion. These proteins are specifically designed to bind to certain molecules and transport them across the cell membrane.
What happens during the process of faciltated diffusion?
An Integral Membrane Protein Assists A Specific Substances Across The Membrane.
Movement across the cell membrane made possible by a protein embedded in the cell membrane?
It is a selectively permeable membrane that allows certain substances in and out, but keeps harmful substances from entering the cell. It could be compared to the security guard at the door of an airport that makes sure that nobody dangerous gets in or out.
Does facilitated diffusion need membrain protein?
Yes, facilitated diffusion requires membrane proteins such as channel proteins or carrier proteins to facilitate the movement of specific molecules across the cell membrane. These proteins are essential for transporting substances that cannot pass through the lipid bilayer on their own.
Movement of substances from higher to lower concentration across a semipermeable membrane that must have a specific protein carrier but no energy expenditure is called?
Facilitated diffusion is the movement of substances from higher to lower concentration across a semipermeable membrane with the help of specific protein carriers, without requiring energy input.
Is facilitated diffusion?
Facilitated Diffusion is the movement of molecules across cell membranes through protein channels and carrier proteins.Facilitated diffusion is a passive transport process, aka no energy required, where substances move down their concentration gradient (high concentration to low concentration) across a protein through a membrane protein because it is unable to diffuse directly through the phospholipid portion of the membrane itself.Diffusion of molecules assisted by protein channels that pierce a cell membrane
A molecule such as glucose must use a protein channel to cross through a cell membrane?
This is correct. Glucose, being a large molecule, requires a protein channel called a glucose transporter to facilitate its passage through the cell membrane. Glucose transporters assist in transporting glucose molecules across the hydrophobic lipid bilayer of the cell membrane.
What kind of protein helps some substances cross the cell membrane?
Carrier proteins help facilitate the movement of certain substances across the cell membrane by binding to specific molecules and carrying them across. These proteins undergo conformational changes to transport the substances across the membrane.
How are the 3 passive transports different?
Simple diffusion - High concentration to low concentration, no energy required osmosis - Movement of water across a membrane, no energy required facilitated diffusion - Movement of substances, protein's are used to help move the substances across the membrane. There are very basic summaries of each.
What is the difference between diffusion and facilitate diffusion?
The difference between diffusion and facilitated diffusion is that facilitated diffusion is that the molecules pass through special protein channels.
Can phenolphthalein pass through a cell membrane?
No, phenolphthalein cannot pass through a cell membrane on its own. It requires a carrier protein or a specific transport mechanism to facilitate its entry into a cell.
What protein is an integral membrane protein that helps move molecules across a cell membrane?
An example of an integral membrane protein that helps move molecules across a cell membrane is a transporter protein. These proteins are embedded within the lipid bilayer and facilitate the movement of specific molecules such as ions or metabolites across the membrane through a process called facilitated diffusion or active transport.
Which type of transport occurs when a membrane protein binds to a molecule on one side of the cell membrane and then releases it on the other side?
Facilitated diffusion occurs when a membrane protein binds to a molecule on one side of the cell membrane and then releases it on the other side. This type of transport does not require energy and relies on the concentration gradient to move molecules across the membrane.
