Question

what type of cell transport goes against the concentration gradient? *
a. diffusion
b. active transport
c. osmosis
d. facilitated diffusion
what is a difference between plant cells and animal cells? *
a. cell membrane
b. nucleus
c. cell wall
d. mitochondria

Explanation:

First Question (Cell Transport):

• Diffusion (A) is the movement of particles from high to low concentration (with the gradient).
• Active transport (B) requires energy and moves substances from low to high concentration (against the gradient).
• Osmosis (C) is the diffusion of water (with the gradient of water potential).
• Facilitated diffusion (D) is a type of passive transport (with the gradient, using proteins). So the correct answer is B.

• Both plant and animal cells have a cell membrane (A), nucleus (B), and mitochondria (D).
• Plant cells have a cell wall (made of cellulose) for structure and support, while animal cells do not. So the correct answer is C.

Answer:

B. Active transport

Second Question (Plant vs Animal Cells):