Which structural polysaccharide can be found in the shells of animals such as lobsters and insects?

• A. $\text{Chitin}$
• B. $\text{Starch}$
• C. $\text{Glycogen}$
• D. $\text{Cellulose}$

Answer: (A)

Verified step by step guidance

1. Identify the structural polysaccharides listed in the options: Chitin, Starch, Glycogen, and Cellulose.
2. Understand the role of each polysaccharide: Chitin is known for its structural role in the exoskeletons of arthropods, such as lobsters and insects.
3. Recognize that Starch and Glycogen are primarily energy storage polysaccharides found in plants and animals, respectively, not structural components.
4. Note that Cellulose is a structural polysaccharide found in the cell walls of plants, not in animal shells.
5. Conclude that Chitin is the structural polysaccharide found in the shells of animals such as lobsters and insects.