Biology 121-Chapter 4 Exam Review
Questions and 100% Correct Answers
One of the major functions of the plasma membrane is to ✅control what enters and
leaves a cell.
Which of the following would directly supply energy to an active carrier protein? ✅ATP
Hikers can detect a dead skunk along a trail long before they actually see it. What
process allows the scent of the skunk to be so widely dispersed? ✅diffusion
The fragrance of bread baking in a kitchen spreads to other rooms by ✅diffusion
Which statement best describes the equilibrium condition shown in the following
illustration? (cool aid) ✅a sample taken from anywhere in the container will have the
same concentration of solute.
Which of the following types of molecules could not easily diffuse across a plasma
membrane? ✅sugar
As a biological process, osmosis ✅is a type of passive transport.
You place some Elodea, an aquarium plant, in a hypertonic solution. The cells of the
Elodea ✅undergo plasmolysis.
Active transport requires ✅cellular energy, usually in the form of ATP.
The concentration of glucose inside a cell is higher than the concentration outside that
cell, yet glucose continues to enter the cell. This is an example of ✅active transport
Passive carrier proteins ✅change shape upon binding to specific external molecules
and then release the molecule on the other side of the membrane.
You observe a cell in a solution that swells until it bursts. What you have seen is an
instance of osmosis in a(n) ______________ solution. ✅hypotonic
The arrows in the following figure show the movement of water across the cell wall and
plasma membrane of a plant cell. For water to move in the direction indicated, the
solution surrounding the cell must be. (arrows pointing toward the outside of the cell)
✅hypertonic.
Questions and 100% Correct Answers
One of the major functions of the plasma membrane is to ✅control what enters and
leaves a cell.
Which of the following would directly supply energy to an active carrier protein? ✅ATP
Hikers can detect a dead skunk along a trail long before they actually see it. What
process allows the scent of the skunk to be so widely dispersed? ✅diffusion
The fragrance of bread baking in a kitchen spreads to other rooms by ✅diffusion
Which statement best describes the equilibrium condition shown in the following
illustration? (cool aid) ✅a sample taken from anywhere in the container will have the
same concentration of solute.
Which of the following types of molecules could not easily diffuse across a plasma
membrane? ✅sugar
As a biological process, osmosis ✅is a type of passive transport.
You place some Elodea, an aquarium plant, in a hypertonic solution. The cells of the
Elodea ✅undergo plasmolysis.
Active transport requires ✅cellular energy, usually in the form of ATP.
The concentration of glucose inside a cell is higher than the concentration outside that
cell, yet glucose continues to enter the cell. This is an example of ✅active transport
Passive carrier proteins ✅change shape upon binding to specific external molecules
and then release the molecule on the other side of the membrane.
You observe a cell in a solution that swells until it bursts. What you have seen is an
instance of osmosis in a(n) ______________ solution. ✅hypotonic
The arrows in the following figure show the movement of water across the cell wall and
plasma membrane of a plant cell. For water to move in the direction indicated, the
solution surrounding the cell must be. (arrows pointing toward the outside of the cell)
✅hypertonic.
