Chloride ions : Simple diffusion :: Some amin | vedclass

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(B) The transport of substances across the cell membrane occurs via different mechanisms.Chloride ions $(Cl^-)$ can move across the membrane via simpl

Vedclass · Accepted Answer

Carrier protein

Vedclass · Answer

(B) The transport of substances across the cell membrane occurs via different mechanisms.Chloride ions $(Cl^-)$ can move across the membrane via simple diffusion.However,larger or polar molecules like glucose and some amino acids cannot pass through the lipid bilayer directly.They require specific membrane transport proteins,known as carrier proteins,to facilitate their movement across the membrane,a process called facilitated diffusion.Therefore,the correct analogy is: Chloride ions : Simple diffusion :: Some amino acids and glucose : Carrier protein.

Property	Simple Diffusion	Facilitated Transport	Active Transport
Transport Saturation	$P$	Yes	Yes
Uphill Transport	No	No	$Q$
Requirement of Energy	No	$R$	Yes

Chloride ions : Simple diffusion :: Some amino acids and glucose : ...

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Describe the role played by protein pumps during active transport in plants.

Why is active transport considered important?

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Choose the correct option for $P, Q$ and $R$.
Property Simple Diffusion Facilitated Transport Active Transport
Transport Saturation $P$ Yes Yes
Uphill Transport No No $Q$
Requirement of Energy No $R$ Yes

$P, Q$ and $R$ respectively are:

Identify $(i), (ii)$ and $(iii)$ based on the provided diagram of carrier proteins in a membrane.

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