Question

What do osmosis and diffusion have in common?

A. Both require the additional energy provided by an energy-carrying molecule, like ATP, to allow molecules to pass through the membrane.

B.
Both permit molecules of any kind, whether solute or solvent, to cross the bilayer membrane.

C.
Both permit molecules of any kind, whether solute or solvent, to cross the bilayer membrane.

D. Both are the net movement of randomly moving molecules that makes concentration nearly equal on both sides of a bilayer membrane.

Answer 1

Explanation:

Osmosis and diffusion both involve the movement of particles from Higher concentration to lower concentration. Some points to remember are:

• They are passive movements of molecules which means that no additional energy is needed to carry the molecules across the mediums.

• Diffusion is the spontaneous movement of any kind of particles from higher concentration to lower concentration. Osmosis is the movement of solvent particles only through a semi permeable membrane.

• But finally, they try to maintain the overall concentration or the total concentration equal of both sides of membrane.

So, from the above we are clear that, Option A is incorrect because it is saying about their energy consumption. Similarly, Option B and C are incorrect (Same in the question). But 4th one is correct, because of the 3rd reason.

Correct option for the given Question:

$\Large{ \boxed{ \sf{ \purple{Option \: D}}}}$

And we are done !!

Answer 2

Osmosis and Diffusion are the net movement of randomly moving molecules that makes concentration nearly equal on both sides of a bilayer membrane.

Hence $\large{\red{\boxed{Option\:D}}}$ is correct.

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Explanation:

• Simple diffusion and osmosis don't require any additional energy for movement. They are thus called passive movement. Hence the Option A is incorrect!

• Osmosis is the movement of solvent only. In osmosis only water or the solvent moves from higher concentration to a lower concentration. The solute cant pass through the membrane during osmosis. Whereas in diffusion any type of material (both solute and solvent) can pass through the membrane. Hence option B is incorrect!

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$\purple{\bold{Knowledge\:Cell:-}}$

• In osmosis a semi-permeable membrane is present.
• Osmosis is vital for matainikg equilibrium in a cell
• Diffusion can occur in any mixture
• Osmosis is a specific type of diffusion.