Is a protein that contributes to the asymmetric arrangement of the phospholipid bilayer
(a) flippase
(b) spectrin
(c) scarmblases
(d) transferase

(a) Flippase

Explanation:

The flippases are the transbilayer translocators present in the plasma membrane and are one of the proteins that are responsible for the asymmetric nature of the plasma membrane with respect to the distribution of phospholipids.

The flippases are the P-type ATPase that serves to move the phosphatidylethanolamine and phosphatidylserine from the outer to the cytosolic leaflet of the plasma membrane.

These proteins are responsible for the abundance of phosphatidylethanolamine and phosphatidylserine in the cytosolic leaflet and that of the sphingolipids and phosphatidylcholine in the outer leaflet.

a scenario where a cell may be needed to perform a form of endocytosis is when transporting large molecules. a scenario where a cell may be needed to perform a form of exocytosis is when releasing the large molecule from the cell.