Which of the following statements about biological membranes are true? (select one or more)Â
a. they are made up mainly of lipids and carbohydratesÂ
b. contain receptors for specific ligands (stimuli)Â
c. they perform energy transformations in photosynthesis and oxidative phosphorylationÂ
d. are able to generate signalsÂ
e. represent a boundary between the cell and the environment that exhibits selective permeabilityÂ
B, c, d,e
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