Which process – diffusion, osmosis or active transport, needs involvement of energy?

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Solution

Active transport is the passage of substances from their lower concentration to their higher concentration across the semi-permeable membrane using energy from the cell.
Diffusion and osmosis does not need the involvement of energy.

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Similar questions

Q. Assertion :Diffusion is a passive type of transport. Reason: Osmosis is an active process of membrane transport.

The following list indicates certain molecules/ions and their mechanism of transport across the cell membrane. Determine the correct pair(s) from the list.

I. Diffusion - $N a^{+}$

II. Active transport - Amino acids

III. Osmosis - Water

IV. Facilitated diffusion - Glucose

Movement of molecules of a substance from the region of their higher concentration to the region of their lower concentration without the involvement of a separating membrane is called

(a) Osmosis (b) Diffusion

Q. Which among the following statements are incorrect?
I. Transport proteins are needed by both facilitated diffusion and active transport.
II. Porins are carrier proteins
III. The carrier proteins needed by facilitated and active transport are specific.
IV. There is no need for energy to pump molecules against a concentration gradient in active transport.
V. Transport rate reaches saturation point when all the transport proteins are used or engaged.

Q. Match the terms to these definitions.
Diffusion, osmosis, impermeable, differentially permeable, fluid mosaic model, micellar theory, endocytosis, exocytosis, passive transport, active transport, microvilli, desmosomes, chemoreception
..........Diffusion of.water through the plasma membrane.

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