Q32 / 161 · NTA Abhyas (NEET) 2020 · Botany · Mineral Nutrition

Which of the following is correct regarding mineral ions absorption in plants?

  • A
    Most of the mineral ions are absorbed passively and some mineral ions are actively absorbed
  • Correct answer
    B
    Most of the mineral ions are absorbed actively and some mineral ions are passively absorbed
  • C
    All the mineral ions are actively absorbed
  • D
    All the mineral ions are passively absorbed

Solution

All the mineral cannot be absorbed passively like water because minerals are present in the soil as charged particles which cannot be pass across the cell membrane and concentration of the mineral in the soil is usually lower than that of a root, hence mostly mineral is transported by active transport. But passive absorption of a mineral is also observed by facilitating diffusion, for e.g., potassium ions can be exchanged by hydrogen ions, absorbed to the surface of the cell membrane.

Hence, the correct answer is option: 'B'.

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