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Facilitated transport.

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13y ago
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13y ago

osmosis

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Q: Which form of transport across the cell membrane does not require energy but a carrier protein?
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What are the types of membrane transport across the cell membrane require a protein carrier?

The brain


Does active transport require a membrane?

Active transport does require a carrier protein. Each protein is specific to one particular molecule.


What process changes the shape of transport proteins when a particle binds with it?

Carrier Proteins. Some don't require ATP (Facillitated transport) and some do require ATP (Active transport) to change shape.


Is carrier proteins passive transport or active transport?

Carrier proteins can use active or passive transport depending on what type of carrier protein it is (meaning what the protein transports). The form of passive transport that they use is facilitated diffusion. An example of active transport is the Sodium Potassium pump. Active transport requires ATP. Facilitated diffusion is used to transport polar molecules and ions that cannot directly cross the cell membrane. Facilitated diffusion doesn't require energy.


Does facilitated diffusion require membrane proteins?

NO, it does not always require a carrier protein!!


Did NaCl require a transport protein?

Did NaCl require a transport protein for diffusion?


What are the main characteristics of facilitated diffusion?

both require special carrier molecule to move substances across the membrane


Does osmosis require a carrier?

NO. Osmosis( by definition) is the DIFFUSION of water from a high concentration gradient to a low concentration gradient across a semipermeable membrane. As diffusion is a form of passive transport, it doesnt require a carrier


What is the difference between facilitated diffusion with the help of a carrier molecule with the help of a transport protein?

Facilitated diffusion is a type of passive transport (does not require energy). It is called facilitated diffusion because it utilises the carrier protein to diffuse through it. Active transport requires energy to pump certain big molecules to cross over and this uses transport protein. Basically, the difference is just the usage of energy.


How is diffusion different from active transport?

active transport is different from diffusion. active transport has to do with the movement of chemical substance through a gradient of concentration. diffusion has to do with requiring the expenditure of energy


How are facilitated diffusion and active transport similar ad how do the differ?

both these processes do the transport against the concentration gradient uh no facilitated diffusion doesnt go against the gradient, the similiarity is that they both use carrier protiens


Does simple diffusion require transport proteins?

no, but active transport on the other hand, does require transport proteins to transport the large molecules into the cell.