Which of the following is not a function of lipids?

Lipids are a diverse group of compounds that play several important roles in biological systems. They are primarily known for their functions in energy storage, providing insulation, and participating in hormone regulation.

Energy storage is a critical function of lipids, as they provide more energy per gram than carbohydrates or proteins, making them an efficient form of stored energy for organisms. Insulation is another key role, particularly for maintaining body temperature in warm-blooded animals, where lipids form a protective layer beneath the skin.

The regulation of hormones is also a significant function of certain lipids, especially steroid hormones that are derived from cholesterol. These hormones, like testosterone and estrogen, are crucial for various physiological processes.

In contrast, support for hydrogen bonding is not a characteristic function of lipids. While hydrogen bonding is vital in many biochemical processes, particularly involving water, nucleic acids, and proteins, lipids do not contribute to this process in the same way. Instead, their structure and hydrophobic nature often lead to the formation of membranes, rather than engaging in hydrogen bonding support. This makes the option regarding support for hydrogen bonding distinct from the recognized roles of lipids.