Multiple Choice
Which of the following terms refers to carbohydrates composed of two monosaccharides?
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4. Biomolecules
Carbohydrates
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In plants, what is the primary function of starch?
A
Structural support as the main component of the cell wall
B
Catalysis of photosynthesis reactions as an enzyme
C
Immediate energy source that is transported through the phloem
D
Long-term energy storage as a polymer of glucose
Verified step by step guidance1
Understand that starch in plants is a polysaccharide composed of glucose units linked together, serving as a storage form of energy.
Recognize that starch is not a structural component like cellulose, which provides structural support in the cell wall.
Note that starch does not function as an enzyme and therefore does not catalyze photosynthesis reactions.
Recall that the immediate energy source transported through the phloem is typically in the form of soluble sugars like sucrose, not starch.
Conclude that the primary function of starch is to act as a long-term energy storage molecule, storing glucose that can be broken down when the plant needs energy.
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