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Facilitated Diffusion

passive trans...

Question

passive transport or facilitated transport/diffusion require proteins for the transportation of particles or not ?

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Solution

Facilitated transport is a type of passive transport which requires carrier proteins to transport molecules or ions across a biological membrane. Diffusion is also a type of passive transport (not requiring energy) but diffusion occurs without the aid of carrier proteins.

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Q. In which type of passive transport simple diffusion or facilitated diffusion. A carrier protein is required for transport across the membrane.

Q. In passive transport, carrier protein is required to facilitate transport of

Q. Which among the following statements are incorrect?
I. Transport proteins are needed by both facilitated diffusion and active transport.
II. Porins are carrier proteins
III. The carrier proteins needed by facilitated and active transport are specific.
IV. There is no need for energy to pump molecules against a concentration gradient in active transport.
V. Transport rate reaches saturation point when all the transport proteins are used or engaged.

Q. Facilitated diffusion requires protein channels to transport molecules across a membrane but does not require a concentrantion gradient.

Q. Properties related to facilitated diffusion and active transport but not to simple diffusion, are
A. Require special membrane proteins
B. Highly selective
C. Saturation
D. Response to protein inhibitors

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