What initiates the sodium-potassium pump?
A. two potassium ions are transported into the cell.
B. ATP binds to the protein which becomes phosphorylated (ADP is released).
C. phosphorylated pump has low affinity for sodium allowing sodium to leave and potassium to bind.
D. three sodium ions bind to the cytoplasmic side of the protein.
E. three sodium ions are translocated out of the cell.
Answer: D
You might also like to view...
Carbohydrate digestion begins in the:
a. mouth b. esophagus c. stomach d. small intestine e. large intestine
Which of the following is a possible outcome of the lysogenic cycle?
A) prophage formation B) prophage formation and propagation C) bacterial cell lysis D) bacterial cell lysis, prophage formation and propagation, and bacterial fission are all possible outcomes of the lysogenic cycle E) bacterial fission
A housekeeping gene is one that codes for a product that:
A. functions in removing dirt from the cell. B. is expressed differentially based on the needs of the cell. C. is expressed at a constitutive level. D. functions exclusively in cell membrane maintenance.
Some animals have evolved sexual maturity in juvenile body forms. This is called ____
a. allometric growth b. vicariance c. paedomorphosis d. punctuated equilibrium e. convergence