A Protein Contains a Section Partially Embedded in a Cell

A protein contains a section partially embedded in a cell membrane and another section that extends out into the external environment.Which statement could be true about this protein?

A) The protein is composed of a chain of alternating hydrophobic and hydrophilic amino acids.
B) The protein is composed of a chain with a long stretch of hydrophobic amino acids and then another stretch of hydrophilic amino acids.
C) The protein has two subunits, each containing alternating hydrophobic and hydrophilic amino acids.
D) The protein is composed of either all hydrophobic amino acids or all hydrophilic amino acids, but not both.
E) The protein is composed of a mix of hydrophobic amino acids and hydrophilic amino acids covalently modified and so converted to hydrophobic residues.