Biology STAAR Practice Test 2025 - Free State of Texas Assessments of Academic Readiness Practice Questions and Study Guide

Question: 1 / 400

The main role of lipids in cells besides forming the cell membrane is?

Production of enzymes

Storing genetic information

Energy storage

The primary function of lipids in addition to forming cell membranes is energy storage. Lipids, particularly fats and oils, are highly efficient at storing energy due to their long hydrocarbon chains, which can be broken down to release energy when needed. This stored energy is crucial for cellular functions, as it provides a source of energy that can be utilized during metabolic processes.

While enzymes are important for catalyzing biochemical reactions, they are primarily composed of proteins, not lipids. The storage of genetic information occurs within nucleic acids like DNA and RNA, not lipids. Lastly, while lipids can play a role in transporting certain nutrients (like lipoproteins), the main purpose of lipids is more centered on energy storage and membrane structure. Understanding these distinct roles helps clarify the importance of lipids within cellular biology.

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Transporting nutrients

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