1. One of the grand challenges in biology is understanding how the first cells formed on Earth. Since all cells are bound by a cell membrane, origin of life researchers are interested in modeling what the first membranes may have been like. What types of molecules might these researchers consider to be the original building blocks of cell membranes? a. hydrophobic molecules b. amphipathic molecules c. carbohydrate molecules d. hydrophilic molecules e. insoluble molecules
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