A
| Front | Why are B-sheets less common than a-helices in protein structures? |
| Back | B-sheets are rigid, while a-helices are more flexible, making them better suited for many protein functions. |
| Front | 1. What is the main structural difference between keratin and collagen, and where is each found in the human body? |
| Back | Keratin has an a-helix structure and is found in hair, nails, and skin. Collagen has a triple-helix structure and is found in tendons, ligaments, and skin. |
| Front | What makes proline and glycine frequently found in B-bends, and how do their properties help in sharp turns? |
| Back | Proline creates natural bends, and glycine, being small, allows sharp turns without steric hindrance. |