Multiple Choice
Which biomolecule is the primary source of energy in the human diet?
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4. Biomolecules
Carbohydrates
Multiple Choice
Which of the following types of plant cells primarily transport sugars over long distances?
A
Tracheids
B
Parenchyma cells
C
Guard cells
D
Sieve tube elements
Verified step by step guidance1
Understand the function of sieve tube elements: These are specialized cells in the phloem of vascular plants responsible for transporting sugars and other organic nutrients over long distances.
Recognize the structure of sieve tube elements: They are elongated cells that form a continuous column, allowing for efficient transport of nutrients through the plant.
Differentiate sieve tube elements from other plant cells: Unlike tracheids, which are involved in water transport, sieve tube elements are specifically adapted for sugar transport.
Consider the role of companion cells: Sieve tube elements are closely associated with companion cells, which help maintain the function and health of the sieve tube elements.
Review the process of translocation: This is the movement of sugars from the leaves, where they are produced during photosynthesis, to other parts of the plant, facilitated by sieve tube elements.
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