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Which one of the following plant plastids stores starch, oil and protein granules?

Which one of the following plant plastids stores starch, oil and protein granules? Correct Answer <span style="">Leucoplast</span>

The correct answer is Leucoplast.

Concept:

  • Plastids are present only in plant cells. 
  • Plastids are differentiated into three different types on the basis of the colour, i.e., type of pigment found in them.
  1. Leucoplasts 
  2. Chromoplast
  3. Chloroplast

Explanation:
Leucoplast

  • Leucoplast are the colorless plastids of varied shapes and sizes with stored nutrients in the form of carbohydrates, lipids, and proteins.
  • These are as follows:
    • Amyloplasts: are the carbohydrate-containing leucoplasts that store starch, e.g., tuber of potato, grain of rice, and wheat.
    • Elaioplasts: are the leucoplasts that store oils and fats, e.g., rose.
    • Aleuroplasts: They are protein storing leucoplasts, e.g., castor endosperm.

Thus, leucoplast stores starch, oil and protein granules.

Additional Information

  • Chloroplast:
    • These are photosynthetic plastids, which are green in colour and found in the leaves of all green plants.
    • They have lamellae organized in the form of grana.
    • They contain mainly chlorophylls and some amount of carotene and xanthophyll. 
  • Chromoplast:  
    • These are non-photosynthetic coloured plastids which synthesize and store carotenoid pigments.
    • They appear orange, red, or yellow in colour.
  • Xanthoplast:
    • Xanthoplasts have yellow pigments i.e. xanthophylls, carotenoids. 

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