What is the primary function of protein enzymes?

What is the primary function of protein enzymes?

• A. Enzymes regulate the rate of chemical reactions
• B. Enzymes speed up reactions by changing temperature
• C. Enzymes store genetic information
• D. Enzymes provide structural support

Answer: (B)

Enzymes act as biological catalysts that speed up chemical reactions by lowering the activation energy, the energy barrier reactants must overcome to react. They achieve this by binding substrates at the active site, orienting them correctly, and stabilizing the transition state, so the reaction proceeds much faster at the body’s normal temperature. This acceleration occurs without changing the overall energy balance of the reaction—the equilibrium stays the same, but it is reached more quickly. Enzymes do not store genetic information (that’s the role of DNA/RNA) and, while some proteins provide structural support, their main job is to accelerate reactions. Temperature affects how fast reactions go, but enzymes enable faster rates without changing temperature, though extreme heat can denature them.

Enzymes act as biological catalysts that speed up chemical reactions by lowering the activation energy, the energy barrier reactants must overcome to react. They achieve this by binding substrates at the active site, orienting them correctly, and stabilizing the transition state, so the reaction proceeds much faster at the body’s normal temperature. This acceleration occurs without changing the overall energy balance of the reaction—the equilibrium stays the same, but it is reached more quickly. Enzymes do not store genetic information (that’s the role of DNA/RNA) and, while some proteins provide structural support, their main job is to accelerate reactions. Temperature affects how fast reactions go, but enzymes enable faster rates without changing temperature, though extreme heat can denature them.