Which diagram represents active transport?
▶️ Answer/Explanation
Ans: B
Active transport involves the movement of molecules against their concentration gradient, requiring energy (ATP). In the diagrams, B shows particles moving from low to high concentration with ATP being used, which matches the definition of active transport.
The other options depict diffusion (A), osmosis (C), or facilitated diffusion (D), which do not require energy. Thus, the correct answer is B.
The diagram represents a substance moving across a cell membrane, using energy from respiration.
Which method of transport does the diagram represent?
A) active transport
B) diffusion
C) evaporation
D) osmosis
▶️ Answer/Explanation
Ans: A
The diagram shows a substance moving against the concentration gradient, which requires energy (from respiration). This process is active transport (A), as it involves the use of ATP to transport molecules.
Diffusion (B) and osmosis (D) are passive processes, while evaporation (C) is unrelated to cellular transport. Since energy is used, the correct answer is A (Active Transport).