The structure of the cell membrane was discovered in 1895 by . Finding a similarity to Olive Oil, he discovers membranes are made of . A. Charles Overton, amino acids
B. Irving Langmuir, lipids
C. Gorter and Grendel, amino acids
D. Charles Overton, lipids

What do isotopes of uranium have the same number of? what do they have a different number of? a) same number of protons; different number of electrons b) same number of protons; different number of neutrons c) same number of electrons; different number of protons d) same number of neutrons; different number of protons