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Active Transport

What are prot...

Question

What are protein pumps used for?

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Solution

Protein pumps
Protein pumps are transmembrane proteins that actively move ions against the gradient of concentration across membranes.
They use ATP to power the movement of ions uphill.

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Q. Protein pumps help in

N a_{-}^{+} K^{+}

pumps are found in membranes of many cells, like nerve cells. It works against electrochemical gradient and involves an integral protein ATPase. For each molecule of ATP used

what is protein pump protein gradient??

What is the role of protein pumps in active transport?

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.

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