Which mineral is a principal component of cell membranes?
A) iron
B) phosphorus
C) potassium
D) iodine
E) magnesium

Question

Quizplus · Accepted Answer

Phosphorus is a main component of cell membranes, as it is a key building block of phospholipids which make up the lipid bilayer of the membrane. Iron is important for oxygen transport, but not a main component of cell membranes. Potassium and magnesium are important for cellular processes but not a key component of the membrane. Iodine is important for thyroid function but not directly involved in cell membrane structure.

Which Mineral Is a Principal Component of Cell Membranes