The energy necessary for active transport across cytoplasmic membranes is believed to come from

1. ATP
2. diffusion
3. osmosis
4. kinetic energy

Correct Answer: (a) ATP

Explanation:

Active transport: Active transport is the movement of molecules across the cell membrane from the region of lower concentration to higher concentration, against the concentration gradient.

As this transport occurs against the concentration gradient, it required the spending of cellular energy in the form of ATP.

For example:

Sodium-Potassium (Na-K) pump that is required to maintain cell potential.

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Updated on: 06-Jan-2023

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