Question

Observe the given image and select the correct statements.

• A. Movement from A to B in image 1 is an example of active transport
• B. Movement from C to D in image 2 is an example of active transport
• C. Movement from A to B needs energy
• D. Movement from C to D needs energy

Answer 1

Answer: (B), (D)

Movement from C to D needs energy

In image 1, the movement of molecules is from high (A) to low (B) concentration. Hence, it is passive transport and does not require energy.
In image 2, the movement of molecules is from low (C) to high (D) concentration. Hence, it is active transport and needs energy.