Chapter 12 - Transport Across Cell Membranes - Questions - Page 417: Question 12-12 B

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(1) Similarity between active transport and passive transport is - there both involve the movement of molecules or ions across the cell membrane. (2) Difference between active transport and passive transport is- Passive transport involves the movement of molecules or ions from an area of high concentration to an area of low concentration, without the need for energy input. . Active transport involves move of molecules or ions against their concentration gradient, from an area of low concentration to an area of high concentration.