Question

1. which of the following is not an example of active transport?

○ membrane pumps
○ endocytosis
○ osmosis
○ exocytosis

Explanation:

• Membrane pumps: Use energy (e.g., ATP) to move substances against their concentration gradient, which is active transport.
• Endocytosis: Is an active process where the cell membrane engulfs substances, requiring energy.
• Osmosis: Is the passive movement of water molecules across a semi - permeable membrane from an area of lower solute concentration to an area of higher solute concentration. It does not require energy input.
• Exocytosis: Is an active process where vesicles fuse with the cell membrane to release substances outside the cell, requiring energy.

Answer:

osmosis