AP®︎ Biology: Topic 2.5 Practice Test
Prepare for your quiz, test, or the AP exam with focused practice questions on Topic 2.5 of AP Biology – Membrane Transport.
Questions List
Topic 2.5
Question 1 Easy
This question tests the following: ENE-2.C
What is the main function of the cell membrane?
What You’re Being Tested On:
Explore the learning objectives taken directly from the College Board’s AP® Biology Curriculum. Ensure you’re prepared for the exact topics covered on the AP® exam, in-class tests, and quizzes, and gain confidence in your mastery of the material.
Topic 2.5: Membrane Transport
Learning Objective: 2.5.A
Describe the mechanisms that organisms use to maintain solute and water balance.
Essential Knowledge: 2.5.A.1
The selective permeability of membranes allows for the formation of concentration gradients of solutes across the membrane.
Essential Knowledge: 2.5.A.2
Passive transport is the net movement of molecules from regions of high concentration to regions of low concentration without the direct input of metabolic energy.
Essential Knowledge: 2.5.A.3
Active transport requires the direct input of energy to move molecules. In some cases, active transport is utilized to move molecules from regions of low concentration to regions of high concentration.
Learning Objective: 2.5.B
Describe the mechanisms that organisms use to transport large molecules across the plasma membrane.
Essential Knowledge: 2.5.B.1
The processes of endocytosis and exocytosis require energy to move large substances or large amounts of substances into and out of cells. i. In endocytosis, the cell takes in large molecules and particulate matter by folding the plasma membrane in on itself and forming new (small) vesicles that engulf material from the external environment. ii. In exocytosis, internal vesicles release material from cells by fusing with the plasma membrane and secreting large molecules from the cell.
