The type of membrane protein that has a straight pathway : ( C ) Receptor protein
Receptor protein binds ligands molecules outside a cell after which it changes its conformation and transmits signal from the molecules through molecular switches into the cell ( via the signal pathways of the cell ).
The process of binding ligand molecules, transmitting signals into the signal pathways of the cell follows a straight pathway for the movement of molecules.
Hence we can conclude that the type of membrane protein that has a straight pathway for molecules to move is Receptor protein.
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