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

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

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During respiration,substrate level phosphorylation occurs in . . . . . . .

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Match Column-$I$ with Column-$II$ and select the correct option.
Column-$I$Column-$II$
$a.$ Cis-aconitate$i.$ $4 \ C$-compound
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