Which of the following pair of plastids - thing stored is NOT correct?

I. Amyloplasts - oils and fats

II. Aleuroplasts - carbohydrates

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SSC CPO 2022 Tier-I Official Paper (Held On 10 Nov 2022 Shift 3) [Answer Key]
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  1. Only I
  2. Both I and II
  3. Neither I nor II
  4. Only II

Answer (Detailed Solution Below)

Option 2 : Both I and II
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Detailed Solution

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The correct answer is Both I and II.

  • Both pair is not correct.

Key Points

  • Amyloplasts:
    • Amyloplasts are plastids that make and store starch in internal membrane spaces.
    • Amyloplasts store carbohydrates (starch), e.g., potatoes. Hence pair I is not correct.
    • Inside amyloplasts, starch forms insoluble particles referred to as starch grains.
    • They are frequently discovered in the tissues of vegetative plants, such as tubers (potatoes) and bulbs.
    • Amyloplasts are also hypothesized to play a role in plant root growth in a downward direction and gravity sensing (gravitropism).
  • Aleuroplasts:
    • A leucoplast kind of plastid called an aleuroplast is used to store proteins. Hence pair II is not correct.
    • They are commonly found in seeds.

Additional Information

  • Elaioplasts:
    • The fats and oils that the plant needs are stored by elaioplasts.
    • Monocotyledon plant seeds and liverworts both contain it.
  • Chromoplast:
    • Chromoplasts are carotenoid-accumulating plastids.
    • They give various tubers and roots, along with a variety of flowers and fruits, their color. 
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