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Does the size or the speed of a molecule determines whether it can pass through the pores of a membrane?
The speed doesn't necessarily determine the permeability, but the size does. Smaller molecules such as O2 can easily enter the cell while CO2 leaves the cell. There are other criteria that also determines whether a molecule can pass through the plasma membrane such as its solubility. Fat soluble molecules such as steroids can easily pass through the membrane.
What are two factors that determine whether or not molecules can pass through a selectively permeable membrane?
One factor is the channel of the molecule, without them the ions and polar molecules would not be able to pass across. Another factor is the size of the molecule, they determine how fast it will defuse.
The process by which glucose can pass through a cell membrane by combining with special carrier molecules is called?
The process by which glucose can pass through a cell membrane by combining with special carrier molecules is called facilitated diffusion. In this process, carrier proteins aid in the movement of glucose across the membrane down its concentration gradient.
Large molecules are surrounded by the cell membrane and enter the cell?
Large molecules can enter cells through processes like endocytosis, where the cell membrane surrounds the molecule and engulfs it in a vesicle. This allows large molecules to be transported into the cell without crossing the lipid bilayer of the membrane.
Can all molecules diffuse through all cell membranes?
No, not all molecules can diffuse through all cell membranes. The ability of a molecule to diffuse through a cell membrane depends on its size, charge, and solubility in lipids. Small, non-polar molecules can generally pass through the lipid bilayer of cell membranes via simple diffusion, while larger, polar molecules may require specific transport mechanisms.
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?
Two characteristics that can prevent a molecule from passing through a membrane are size and charge. Larger molecules may be too big to fit through the pores in the membrane, while charged molecules may be repelled by the hydrophobic core of the membrane.
State one factor that influences which molecules can pass through the cell membrane?
Responses include, but are not limited to:molecule size; concentration of molecules; pore size; carrier proteins; molecule charge/shape.
What are the special structures in the cell membrane that allow water and sugar pass through it made of?
These special structures are called protein gates or protein channels. Water is able to diffuse through the cell membrane since it is a small molecule. However, there are channels called aquaporins that allow water to enter the cell. A glucose molecule cannot just diffuse into a cell. There are glucose channels on the surface of the cell membrane that bind glucose molecules and allow them to enter the cell.
How a particular molecule crosses the membrane depends in part on the molecule's size true or false?
True. The size of a molecule can impact its ability to cross the membrane. Smaller molecules can pass through the membrane more easily through diffusion, while larger molecules may require specific transport proteins or channels to facilitate their passage.
Does the size or the speed of a molecule determines whether it can pass through the pores of a membrane?
The speed doesn't necessarily determine the permeability, but the size does. Smaller molecules such as O2 can easily enter the cell while CO2 leaves the cell. There are other criteria that also determines whether a molecule can pass through the plasma membrane such as its solubility. Fat soluble molecules such as steroids can easily pass through the membrane.
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.
What are two factors that determine whether or not molecules can pass through a selectively permeable membrane?
One factor is the channel of the molecule, without them the ions and polar molecules would not be able to pass across. Another factor is the size of the molecule, they determine how fast it will defuse.
Molecules A and B are both organic molecules found in many cells when tested it is found that molecule A cannot pass through a cell membrane but molecule B easily passes through state one way the two?
Molecule A may be too large or too polar to pass through the cell membrane effectively, while molecule B may be smaller and more nonpolar allowing it to pass through easily via diffusion. The difference in membrane permeability between the two molecules could be due to variations in size, charge, polarity, or interaction with membrane proteins.
How do molecules that are too large to cross the membrance enter into the cell?
Large molecules can enter a cell through endocytosis, where the cell membrane folds around the molecule, forms a vesicle, and brings it into the cell. This process allows the cell to take in nutrients, signaling molecules, and other substances that are too large to pass through the membrane directly.
In osmosis What molecule does not move across the membrane?
In osmosis, large molecules like proteins and polysaccharides do not move across the membrane. Only smaller molecules such as water and ions can pass through the membrane during osmosis.
The process by which glucose can pass through a cell membrane by combining with special carrier molecules is called?
The process by which glucose can pass through a cell membrane by combining with special carrier molecules is called facilitated diffusion. In this process, carrier proteins aid in the movement of glucose across the membrane down its concentration gradient.
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 likely smaller and more hydrophobic, allowing it to pass through the cell membrane easily via simple diffusion. Molecule B may be larger, polar, or charged, requiring a transporter or channel for passage across the cell membrane.
