Which of the following statements about ATP-powered pumps is NOT true? All ATP-powered pumps contain at least one transmembrane domain. F-class and V-class pumps transport the same ion but in opposite directions. Only P-, F-, and V-class pumps transport ions. ABC transporters are found in organisms ranging from bacteria to humans.

1) Only the P-type ATPase actively transports ions across biological membranes. P-ATPases (also named E1-E2 ATPases) are found both in plasma and organelle membranes. These ATPases serve to transport ions and phospholipids by hydrolyzing ATP to ADP and phosphate.

2) A- and F-ATPases synthesize ATP by transforming the energy from a gradient of ions across the cell membrane.

3) V-ATPase (also known as Vacuolar-H+ ATPases) acidifies vacuole, lysosome, endosome and Golgi membranes. This type of ATPase couples the hydrolysis of ATP to the active transport of protons across biological membranes.

4) E-ATPases hydrolyze extracellular ATP.

bratislava bratislava · Answer 2 · 2021-11-17T06:06:53+01:00

An ATP power ion pump is one that is used by the cells in order to generate ions gradients at the expanse of ATP hydrolysis and these pumps have to differ from each other. As they consist of 2-10 polypeptide chains.

They are also called sodium-potassium pumps and move the sodium ions to the potassium ions into the cell.

P ions calls is one that of the phosphorylation, V ions pumps have exclusively protons, and the F ions pulps don't involve phosphoprotein.

Hence the option C is correct.

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