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Biology 121-Chapter 4 Exam Review Questions and 100% Correct Answers
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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 ...

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  • August 13, 2024
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  • 2024/2025
  • Exam (elaborations)
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  • biology 121 chapter 4 exam review questions and 10
  • one of the major functions of the plasma membrane
  • which of the following would directly supply energ

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  • BIO 121

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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.

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