Question

which of the following scientist(s) was the first to hypothesize that membranes are made of lipids because substances that dissolve in lipids enter cells faster then those that are insoluble?
charles overton
irving lagmuir
e. gorter and f. grendel
hugh davson and james danielli
s. singer and g. nicholson

Explanation:

Charles Overton observed that substances soluble in lipids entered cells more readily than those that were insoluble. This led him to hypothesize that cell membranes are made of lipids. Irving Langmuir's work was more on surface chemistry and monolayers. E. Gorter and F. Grendel did experiments on extracting lipids from red blood cells and calculating membrane area. Hugh Davson and James Danielli proposed a model of the cell membrane with a lipid bilayer and protein layers. S. Singer and G. Nicholson proposed the fluid - mosaic model of the membrane.

Answer:

Charles Overton