European Baccalaureate Biology Practice Questions - European Baccalaureate Biology Exam

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Which molecular feature of phospholipids causes them to spontaneously assemble into a bilayer structure in an aqueous cellular environment?

Amphipathic structure containing a hydrophilic phosphate head and hydrophobic fatty acid tails Presence of covalent disulfide bridges linking adjacent glycerol backbones Rigid steroid ring structure that repels water molecules on both sides of the membrane High concentration of ionic peptide bonds between polar amino acid side chains

Correct Answer:

Amphipathic structure containing a hydrophilic phosphate head and hydrophobic fatty acid tails

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