Which description best defines gluten?

• A. A carbohydrate that provides sweetness
• B. A type of fat
• C. A water-soluble vitamin
• D. A tough elastic protein that gives dough its strength and ability to retain gas

Answer: (D)

Gluten is a tough elastic protein that gives dough its strength and ability to retain gas. It forms when the gluten-forming proteins in wheat flour hydrate and link during mixing and kneading, creating a stretchy network. This network traps the carbon dioxide produced by yeast or other leavening agents, letting the dough rise and hold its shape as it bakes. The elasticity lets dough stretch rather than tear, which helps create breads with a chewy, open crumb. This concept also explains why different flours behave differently: bread flour, higher in protein, builds a stronger gluten network for more structure, while cake flour has less gluten for a softer, tender crumb. It’s not a carbohydrate, fat, or a water-soluble vitamin, which are different nutrient categories and don’t describe how dough develops texture and rise.