List seven major functions performed by proteins.

Verified step by step guidance

1. Understand that proteins are essential macromolecules in the body that perform a wide variety of functions necessary for life.
2. Identify that one major function of proteins is serving as enzymes, which catalyze biochemical reactions to speed up metabolic processes.
3. Recognize that proteins also provide structural support, forming components of cells and tissues such as collagen in connective tissue.
4. Note that proteins play a role in transport, such as hemoglobin transporting oxygen in the blood.
5. Acknowledge that proteins are involved in communication and signaling, including hormones and receptors that regulate physiological processes.
6. Consider that proteins contribute to immune defense by forming antibodies that recognize and neutralize pathogens.
7. Remember that proteins are important for movement, as contractile proteins like actin and myosin enable muscle contraction.

Key Concepts

Structural Role of Proteins

Proteins provide structural support to cells and tissues, forming components like collagen in connective tissues and keratin in hair and nails, which maintain shape and integrity.

Enzymatic Function

Proteins act as enzymes that catalyze biochemical reactions, increasing reaction rates without being consumed, essential for metabolism and cellular processes.

Transport and Storage

Proteins facilitate the transport of molecules, such as hemoglobin carrying oxygen in blood, and store essential substances, ensuring their availability when needed.