Biology 05 Plasma Membranes Structure & Function


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Unit 2. The Cell MCQ Multiple Choices Questions Quiz Test Bank

Chapter 05: Structure and Function of Plasma Membranes

5.1 Components and Structure

5.2 Passive Transport

5.3 Active Transport

5.4 Bulk Transport

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Biology 05 Plasma Membranes Structure & Function
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Sample Questions from the Biology 05 Plasma Membranes Structure & Function Quiz

Question: Active transport must function continuously because __________.


plasma membranes wear out

not all membranes are amphiphilic

facilitated transport opposes active transport

diffusion is constantly moving solutes in opposite directions

Question: Which characteristic of a phospholipid contributes to the fluidity of the membrane?


its head


a saturated fatty acid tail

double bonds in the fatty acid tail

Question: What happens to the membrane of a vesicle after exocytosis?


It leaves the cell.

It is disassembled by the cell.

It fuses with and becomes part of the plasma membrane.

It is used again in another exocytosis event.

Question: How does the sodium-potassium pump make the interior of the cell negatively charged?


by expelling anions

by pulling in anions

by expelling more cations than are taken in

by taking in and expelling an equal number of cations

Question: What is the primary function of carbohydrates attached to the exterior of cell membranes?


identification of the cell

flexibility of the membrane

strengthening the membrane

channels through membrane

Question: Which transport mechanism can bring whole cells into a cell?




facilitated transport

primary active transport

Question: Water moves via osmosis _________.


throughout the cytoplasm

from an area with a high concentration of other solutes to a lower one

from an area with a high concentration of water to one of lower concentration

from an area with a low concentration of water to one of higher concentration

Question: What problem is faced by organisms that live in fresh water?


Their bodies tend to take in too much water.

They have no way of controlling their tonicity.

Only salt water poses problems for animals that live in it.

Their bodies tend to lose too much water to their environment.

Question: The principal force driving movement in diffusion is the __________.



particle size

concentration gradient

membrane surface area

Question: Which plasma membrane component can be either found on its surface or embedded in the membrane structure?






Question: What is the combination of an electrical gradient and a concentration gradient called?


potential gradient

electrical potential

concentration potential

electrochemical gradient

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