Question

The main difference between active and passive transport across cell membrane is

• A. passive transport is non-selective whereas active transport is selective
• B. passive transport requires a concentration gradient across a biological membrane whereas active transport requires energy to move solutes
• C. passive transport is confined to anionic carrier proteins whereas active transport is confined to cationic channel proteins
• D. active transport occurs more rapidly than passive transport

Answer 1

Answer: (B)

The main difference between active and passive transport across the cell is that passive transport requires a concentration gradient across the biological membrane involved.
Whereas during active transport, the movement of molecules is from lower concentration to higher concentration that means they move against the concentration gradient by using ATP.