Chapter 5 - The Working Cell Review Packet
Membranes are a fluid mosaic of phospholipids and proteins
Figure 5.1 Label the diagram of the plasma membrane and the extracellular
matrix – cholesterol glycoproteins, glycolipids, phospholipids, integrin,
cholesterol, cytoskeleton.
Question 5.2
Explain the evolution connection between lipids and the plasma membrane.
Question 5.3 Describe the process in this diagram. Specifically, what is
going on, what is the process called, and what do we call this when molecules
move back and forth at an equal rate, with no net change?
Question 5.4 Indicate the direction of movement and the material that
moves for the following problem. Two
solutions are separated by a
semipermeable membrane (water can
diffuse, glucose can’t). On the left side
there is a .7% glucose solution and on the
right side as a .4% concentration of
glucose. What moves, in what direction,
and why? What is the movement called?
Question 5.5 Label the diagram below; identify plant and animal cell, label
the isotonic, hypertonic, and hypotonic solutions. Compare “normal” cell
water balance in an animal cell with the ”normal” cell water balance in a plant
cell.
Questions 5.6
What is facilitated diffusion?
What properties of the cell membrane make this possible?
Give an example.
How is water transported?
Section 5.8
In active transport, a cell must expend ____________________ to move a
solute _________________ its concentration gradient.
Section 5.8/5.9 Exo/endocytosis
Fill in the table below:
Description
Exocytosis
Endocytosis
Phagocytosis
Pinocytosis
Receptor mediated endocytosis
Sodium potassium pump
Energy and the cell
5.10 Cells transform energy to do work
Define the term energy-
What is it?
Fill in the table below. For the definition use no more than 4 words.
Type of energy
Definition (by association)
Kinetic
Heat
Potential
Chemical
Question 5.11
How does the second law of thermodynamics help explain the diffusion of a
solute across a cell membrane?
5.12 Chemical reactions
Make a concept map that summarize the two pathways chemical reactions
take using – exergonic, endergonic, cell respiration, photosynthesis,
metabolism, and energy coupling.
Figure 5.12 – label using the words exergonic, endergonic, energy released,
energy required, reactants, and products
Questions 5.13
What types of cellular work is performed by ATP?
How do exergonic processes power endergonic reactions?
Figure 5.14 Label this diagram Mr. Gorbachev!
Question 5.15
Explain how sucrose is enzymatically broken down into glucose and fructose.
What effect does temperature and pH have on enzyme activity?
5.16 Inhibitors and feedback
Distinguish between competitive and non competitive inhibition by drawing 1
example of each.
Your book introduces feedback inhibition in a rather abbreviated way. Why
is it important for a cell to regulate metabolism?