Question

Which of the following statement is incorrect about osmosis? i. It occurs only in plants ii. It occurs through a semipermeable membrane iii. The water molecules move from a region of higher concentration to a region of lower concentration iv. The molecules move along a concentration gradient​

Answer 1

Answer:

Osmosis is a process in which the water molecules move from higher solvent concentration to lower solvent concentration through a semipermeable membrane. This process does not require energy.

Electron microscope uses very high voltage electricity. It uses electromagnets instead of glass lenses and a beam of electrons instead of light. Hence, gives better, clear image than a light microscope.

Active transport of materials is rapid and usually occurs against the concentration gradient, i.e., from low to high concentration. It involves carrier proteins and energy in the form of ATP.

A semipermeable membrane is a selectively permeable membrane, it allows passing of specific solutes and solvents through it. Thus, the correct answer is option C.

Explanation:

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Answer 2

The incorrect statement about osmosis is- i. It occurs only in plants.

• In osmosis, the diffusion of water molecules takes place from a solution of higher concentration to a solution of lower concentration through a semi-permeable membrane. Thus, a concentration gradient should be present for the osmosis to happen.
• Osmosis occurs in both plant and animal cells. In plants, the roots absorb water from the soil with the help of osmosis. In animals, osmosis helps in the transport of nutrients into and out of the cell.