AP BIOLOGY

Detailed explanation-1: -Carbohydrates can be used as an immediate source of energy by largely all cells, but in many photosynthetic organisms a major portion of the carbohydrates will be used for production of structural compounds, e.g., cellulose in cells walls, or for synthesis of storage products such as starch.

Detailed explanation-2: -Plant cells are surrounded by cell walls built largely from complex carbohydrates. The primary walls of growing plant cells consist of interdependent networks of three polysaccharide classes: cellulose, cross-linking glycans (also known as hemicelluloses), and pectins.

Detailed explanation-3: -Glucose that is consumed is used to make energy in the form of ATP, which is used to perform work and power chemical reactions in the cell. During photosynthesis, plants convert light energy into chemical energy that is used to build molecules of glucose.

Detailed explanation-4: -Carbohydrates are the nutrients most frequently used as an energy source (containing 4kcal per gram), as they are fast-acting and turn into energy as soon as they are ingested. This energy powers the brain and body.

Detailed explanation-5: -Carbohydrates are found in plant cell walls because they serve as building blocks for components like cellulose that provide structural support to plant cells. Carbohydrates also play a second role in plants, which is delivering energy for growth.