Which of the following statements describes integral membrane proteins?
(I)They protect the contents of the cell from chaotropic agents such as urea.
(II)They are easily dissociated from the membrane by changes in pH or high salt concentration.
(III)They are held tightly in place by hydrophobic effects between the membrane and hydrophobic amino acids.
A)I,II,III
B)I,III
C)I
D)II
E)III

Question

Quizplus · Accepted Answer

Integral membrane proteins are held tightly in place by hydrophobic interactions between the membrane and hydrophobic amino acids. They cannot be easily dissociated by changes in pH or high salt concentration. They also do not protect the contents of the cell from chaotropic agents such as urea. Therefore, statement III is the only one that describes integral membrane proteins accurately.

Which of the Following Statements Describes Integral Membrane Proteins