Question

formation of membranes
how do membranes form spontaneously?
multiple choice
enzymes can synthesize lipids directly into a membrane.
enzymes release energy that is used to link phospholipids together.
lipids bind to each other through hydrophobic bonds.
the hydrophobic polar groups on phospholipids are attracted to each other.
the hydrophobic fatty acid tails on phospholipids are repelled by water.

Explanation:

Phospholipids in membranes have hydrophobic fatty - acid tails. In an aqueous environment, these hydrophobic tails interact with each other through hydrophobic bonds to minimize contact with water, driving membrane formation. Enzymes are not directly involved in the spontaneous formation in the way described in the first two options. Hydrophobic groups are non - polar, not polar. While the repulsion of hydrophobic tails by water is part of the story, the key is the binding of lipids to each other through hydrophobic bonds for membrane formation.

Answer:

Lipids bind to each other through hydrophobic bonds.