Question

Osmotic pressure of a cell kept in water is chiefly regulated by

• A. Vacuoles
• B. Plastids
• C. Ribosomes
• D. Mitochondria

Answer 1

The correct option is A Vacuoles

Vacuoles are the organelles that store all the extra water and salts that are the basis of creating osmotic pressure in the cell. The vacuole takes up a huge central place in the cell. The solution outside the cell is hypertonic, hypotonic or isotonic with respect to the contents inside the vacuole. Plastids are the centres for photosynthesis, Ribosomes are small granule-like structures that help in protein synthesis whereas mitochondria generate energy for the cell by utilising sugars.

So the correct answer is 'Vacuoles'.