Question 41

Plants store carbohydrates for future metabolic use in the form of starch.

Starch is the primary form in which plants store carbohydrates, allowing them to utilize this energy source during periods of low photosynthesis or during growth.

A) cellulose

Cellulose is a complex carbohydrate that forms the structural component of plant cell walls. While it is essential for plant structure, it is not a storage form of carbohydrates for metabolic use.

B) fat

Fats are a form of energy storage primarily in animals and some plants, but they are not the main storage form of carbohydrates in plants. Plants predominantly utilize carbohydrates like starch for energy storage.

C) chlorophyll

Chlorophyll is a pigment crucial for photosynthesis, allowing plants to absorb light, but it does not serve as a carbohydrate storage form. It is involved in the process of converting light energy into chemical energy, not in energy storage.

D) starch

Starch is the correct answer as it is the primary storage polysaccharide in plants, composed of glucose units. It serves as a reserve of energy that can be broken down when needed for metabolic processes.

Conclusion

Starch is definitively the correct answer as it is specifically designed for energy storage in plants, enabling them to convert it back into glucose when required. In contrast, cellulose, fat, and chlorophyll do not fulfill this function, highlighting the unique role of starch in plant metabolism.