Which of the following is true of a cell membrane?
a) Cell membranes allow ALL substances to pass through easily
b) It is selectively permeable so only certain molecules can pass through it
c) It acts more like a fluid than a solid because its molecules are constantly moving
d) Cell membranes surround all animal, plant, and bacterial cells
e) It is a bi-layer composed mainly of phospholipids and proteins
Answer:
b) It is selectively permeable so only certain molecules can pass through it
c) It acts more like a fluid than a solid because its molecules are constantly moving
d) Cell membranes surround all animal, plant, and bacterial cells
e) It is a bi-layer composed mainly of phospholipids and proteins
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