Active transport of solute in plants refers t | vedclass

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Question

(B) Active transport involves the movement of molecules against their concentration gradient,which requires metabolic energy. In plant cells,this ener

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Not only from $ATP$ hydrolysis but also from the collapse of a proton motive force

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(B) Active transport involves the movement of molecules against their concentration gradient,which requires metabolic energy. In plant cells,this energy is primarily provided by $ATP$ hydrolysis. However,many transport processes,such as the loading of sucrose into phloem sieve tubes,utilize a proton gradient ($H^+$ gradient) established by $H^+-ATPases$. The subsequent movement of solutes (like sucrose) is coupled with the movement of protons down their electrochemical gradient (proton motive force). Therefore,the energy for active transport is derived from both $ATP$ hydrolysis and the collapse of the proton motive force.

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

Active transport of solute in plants refers to the flow of solutes against a concentration gradient and therefore requires an input of energy. This energy is derived:

Similar Questions

Define uniport,symport and antiport. Do they require energy?

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:

Facilitated diffusion is characterized by all,except