Question

Statement A: In diffusion, molecules move in a random fashion.

Statement R: Diffusion can be both uphill and downhill.

• A. if both A and R are true and R is the correct explanation of A
• B. if both A and R are true but R is not the correct explanation of A
• C. if A is true but R is false
• D. if both A and R are false.

Answer 1

The correct option is C

if A is true but R is false

In diffusion, the molecules possess random motion. However, it cannot be uphill; it naturally occurs along the concentration gradient and not against it.