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Which of the following carbohydrates primarily functions as a long-term energy storage molecule in animals?
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4. Biomolecules
Carbohydrates
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What is the primary function of starch in plants?
A
It provides structural support to cell walls.
B
It serves as a storage form of energy.
C
It acts as a catalyst in photosynthesis.
D
It transports water throughout the plant.
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Understand the role of starch in plants: Starch is a polysaccharide composed of glucose molecules linked together. It is synthesized during photosynthesis and stored in plant cells.
Clarify the primary function of starch: Starch serves as a storage form of energy in plants. When needed, it can be broken down into glucose to provide energy for cellular processes.
Eliminate incorrect options: Structural support to cell walls is provided by cellulose, not starch. Starch does not act as a catalyst in photosynthesis, nor does it transport water throughout the plant.
Relate starch to energy storage: Plants store starch in specialized structures like chloroplasts and amyloplasts. This stored energy can be utilized during periods of low photosynthetic activity, such as nighttime or winter.
Conclude the correct answer: The primary function of starch in plants is to serve as a storage form of energy, ensuring the plant has a reserve of glucose for metabolic needs.
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