All of the following are true of the NaK ATPase EXCEPT it wi

All of the following are true of the Na+/K+ ATPase EXCEPT:

it will carry a signal sequence in the amino acid sequence that will be recognized by signal recognition particle

The ribosome it is translated on will be targeted to the ER

It will travel through the Golgi on its way to the plasma membrane

It is an example of how the cell uses the energy of ATP in an energy coupling mechanism

Solution

B. The ribosome it is translated on will be targeted to the ER - False

The energy required for the transport of the molecule across the membrane is derived from the coupled hydrolysis of ATP, for example the movement of Na⁺ and K⁺ ions by the Na⁺/K⁺-ATPase. All cells maintain a high internal concentration of K⁺ and a low internal concentration of Na⁺. The resulting Na⁺/K⁺ gradient across the plasma membrane is important for the active transport of certain molecules and the maintenance of the membrane electrical potential.

A variety of organic molecules and a few ions are moved across membranes by sodium-coupled secondary active transport. For example, amino acids, in most cells,, are actively transported into the cell by cotransport with sodium ions, attaining intracellular concentratoins 2 to 20 times higher than in the extracellular fluid.

New Na⁺/K⁺-ATPase molecules are synthesized by golgi apparatus and sent to the plasma membrane.