Question

question 21
which of the following is the most accurate statement comparing cell membranes and cell walls?
animal cell
plant cell
cytoplasm
nucleus
cell membrane
cellulose cell wall
mitochondrion
permanent vacuole
chloroplast
a cell membranes are found only in animal cells; cell walls are found only in plant cells.
b cell walls function mostly for photosynthesis while cell membranes function mostly for cellular respiration.
c cell membranes function mostly as selectively permeable gatekeepers, while cell walls function mainly as support systems.
d cell walls prevent everything from entering the cell, while cell membranes allow some things to enter.

Explanation:

Cell membranes are selectively permeable, regulating substance entry/exit. Cell walls provide structural support. Analyzing options: a is wrong (membranes in all cells, walls not only plants); b incorrect (functions not photosynthesis/respiration); d false (walls are porous). c correctly states their main functions.

Answer:

c. Cell membranes function mostly as selectively permeable gatekeepers, while cell walls function mainly as support systems.