In cell membrane, on the basis of mass, proteins and lipids are present at a ratio of: (A) 1:02, (B) 1:01, (C) 2:01, (D) 4:01
Answer is B. According to 'Principles of Medical Physiology', "The cell membrane contains proteins and lipids in 50:50 ratios. This refers to the ratio of their masses and not numbers".