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Most of the red, blue and purple colours of plants are due to a pigment called

  • A.Anthocyanin
  • B.Carotene
  • C.Chlorophyll
  • D.Xanthophylls

Answer: A

Red, blue and purple plant colours are usually due to anthocyanins, water-soluble pigments dissolved in the cell sap.

Their colour depends on the pH: red in acid, purple near neutral, blue in alkali. They give roses, beetroot and red cabbage their colour, and autumn leaves much of theirs.

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