Which of the four classes of ATP-powered pumps share overall similarity: several

Question

Which of the four classes of ATP-powered pumps share overall similarity: several 'subunits, the same general organization, and a similar function in being H+ transporters? ABC superfamily and P-class pumps ABC superfamily and F-class pumps F-class pumps and P-class pumps F-class pumps and V-class pumps. the major ATP-powered pump responsible for maintaining ion gradient across the plasma membrane of mammalian cells is the calmodulin-activated plasma membrane Ca^2+ ATPase the sarcoplasmic reticulum Ca^2+ ATPase the vascular F-class proton pump the plasma membrane Na^+/K^+ ATPase ABC superfamily proteins are thought to act as A TP-dependent flippers in transporting lipophilic drugs out of mammalian cells Ca^2+ out of mammalian cells H^+ out of mammalian cells Na^+ out of mammalian cells/K^+ into mammalian cells Ions diffuse across membranes down their electrochemical gradient electrogenic gradient electrical gradient concentration gradient osmotic gradient. Which of the following is not true of the carrier molecules involved in facilitated diffusion? they increase the speed of transport across a membrane they can concentrate solute molecules on one side of the membrane they may have specific binding sites for the molecules they transport they may undergo a conformational change upon binding of solute they may be inhibited by molecules that resemble the solute to which they normally bind. Cotransport may involve active transport of two solutes through a transport protein passive transport of two solutes through a transport protein ion diffusion against the electrochemical gradient created by an electrogenic pump a pump such as the Na^+ - K^+ pump that moves ions in two different directions

Explanation / Answer

Answer= 41]

The ATP powered pump share overall similarity ,several subunits the same general organization & a similar function in being H+ transporters are

4] F class pump & V class pump

Explaination=

F class pump = also known as F Atpase or Fo -F1 ATPase

have a compex polypeptide composition & are not phosporylated intermediate in reaction mechanism

In nonphotosynthetic eukaryotes F pumps are found on inner membrane of mitochondria

These ATPases couple the flow of protons to ATP hydrolysis & synthesis

V ATPase= are found within the membrane of the cell ( endomembranous )

not phosporylated during catalysis

Related Questions

Navigate

• Browse (All)
• Browse W
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.