Vitamin-$C$ was the first vitamin to be produced by a fermentation process using

  • A
    Penicillium
  • B
    $E$. coli
  • C
    Yersinia pestis
  • D
    Acetobacter

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Riboflavin (Vitamin $B_2$) is produced by which of the following microorganisms?

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$A$: Statins are products of the fermentation activity of yeast.
$R$: Statins and mevalonate compete for the same active site on the enzyme involved in cholesterol synthesis.

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