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Question

In the sieve elements, which one of the following is the most likely function of P-protein?

A
Deposition of callose on sieve plates
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B
Providing energy for active translocation
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C
Autolytic enzymes
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D
Sealing mechanism on wounding
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Solution

The correct option is D Sealing mechanism on wounding
The p-proteins can be traced in the phloem. They generally play a role during an unfavorable condition where quickly aggregate at the sieve plate to form a clot when the sieve element is disrupted. It prevents the flow of the phloem sap. Thus, the correct answer is option D.

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