What are the main structural functions of proteins within cells?

Proteins play a crucial role in forming cellular structures and supporting various functions within cells. They contribute to the architecture of cells by forming the cytoskeleton, which provides shape and support, and are involved in building cellular components such as membranes, organelles, and tissue structures. This structural functionality is essential for maintaining the integrity of cells and enabling them to perform their designated tasks effectively.

In addition to their structural roles, proteins are involved in numerous cellular activities such as signaling, catalyzing biochemical reactions as enzymes, and facilitating communication between cells. Their versatility and ability to form complex three-dimensional shapes allow them to fulfill these various functions, which makes them vital to the overall functioning of living organisms. Other options, such as storing genetic information or providing energy, represent roles filled by nucleic acids and carbohydrates, respectively, rather than proteins. Similarly, while proteins may be involved in transporting substances, this is a more specific role rather than a general structural function.