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Which among the following works against a concentration gradient during transportation?

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Which among the following works against a concentration gradient during transportation?
1. Lysosome
2. Vacuole
3. Mitochondria
4. Ribosome
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Correct Answer - Option 2 : Vacuole

The correct answer is ​Vacuole.

  • The outer wall of the vacuole is known as the tonoplast.

  • It is made up of a single membrane and occupies 90% of space.
  • Tonoplast facilitates the transportation of ions and other material against the concentration gradients into it.
  • Therefore, concentration inside the vacuole is higher than in the cytoplasm.
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