Answer: Starch stores more energy than glucose because starch molecules have more chemical bonds than glucose molecules (option d).
Step-by-step explanation:
Starch and glucose are both carbohydrates, but they have different structures and functions. Glucose is a simple sugar, while starch is a complex carbohydrate composed of many glucose molecules joined together.
Glucose is the primary source of energy for cells. It can be quickly broken down through cellular respiration to release energy. However, glucose molecules are relatively small and contain fewer chemical bonds.
On the other hand, starch is a polysaccharide made up of long chains of glucose molecules. These chains form a more complex structure with multiple chemical bonds. These additional bonds require more energy to break, making the energy stored in starch more readily available for long-term use.
When plants produce glucose through photosynthesis, they convert some of it into starch for energy storage. Starch acts as a reserve energy source that can be broken down and used when glucose is not immediately needed. This storage capacity allows plants to store larger amounts of energy for future use, such as during periods of limited sunlight or when the demand for energy is high.
In summary, starch stores more energy than glucose because it consists of multiple glucose molecules linked together, forming more chemical bonds. These additional bonds require more energy to break, making the energy stored in starch more readily available for long-term use.