The correct answer would be integral membrane proteins.
The plasma membrane is semi-permeable in nature due to which large molecules such as proteins, carbohydrates, et cetera, and ions cannot pass through the plasma membrane.
Integral membrane proteins are the transmembrane proteins which form channels, pumps, transporters which help in transportation of large molecules and charged ions across the cell membrane.
Not sure if theres supposed to be a pic or chart with this but if its any help, recessive traits only show when theres no dominant traits present and both parents need recessive genes