Campbell Biology, Books a la Carte Plus Mastering Biology with eText -- Access Card Package (10th Edition)
10th Edition
ISBN: 9780133922851
Author: Jane B. Reece, Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Robert B. Jackson
Publisher: PEARSON
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Textbook Question
Chapter 48.2, Problem 3CC
MAKE CONNECTiONS → Review Figure 7.10, which illustrates the diffusion of dye molecules across a membrane. Could diffusion eliminatethe concentration gradient of a dye that has a net Charge? Explain.
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Or. Foyez Samar
The volume enclosed by the plasma membrane of plant cells is often much larger the c
corresponding volume in animal cells. The most regsengble explanation for this observation Is that
A) plant cells are capable of having a much higher surface-to-volume ratio than animal cells.
B) plant cells have a much more highly convoluted (folded) plasma membrane than animal cens.
C) plant cells contain a large vacuole that reduces the volume of the cytoplasm.
D) animal cells are more spherical, whereas plant cells are elongated.
12 A u
Molecular Transport Across Membranes Workshop
How does the cell membrane control movement of materials?
The cellular membrane is critical to the maintenance of homeostasis in living
organisms. The cell membrane separates the cell from the external environment and
plays a critical role in regulating movement of material in and out of the cell.
Additionally, eukaryotic cells are made complex by the presence of internal
membranes that form organelles, so the cells may become specialized. These organelle
membranes create compartments within the cell that can do specific functions.
For this exercise, you will work in groups of four to progress through the activities.
At the end of each activity, one group (chosen at random) will share how they
responded and open the floor for further discussion.
Model 1 - Types of Ions and Molecules in a Cell
Type 4 Molecules
Molecular oxygen (O,):
Туре 1 Ions
Type 2 Molecules
Туре 3 Molecules
Glucose:
Water:
Potassium: K*
OH
0=0 D
Sodium: Na+ +
O-
Urea:…
please choose correct letter and explain a bit
1. The strongest way by which a protein can maintain its shape is by using:a) ionic bonds
b) disulfide bonds
c) star war forces
d) van der Waals forces
2. If a cell (like an amoeba) would be capable of migrating from one place to another only with movement created from the inside of the cell, then we can say that that movement is done mainly by:
a) glycoproteins
b) feet
c) microtubules
d) actin filaments
True or False: In eukaryotic cells (such as human cells), the variety and diversity of proteins is much less than the variety and diversity of lipids.
Chapter 48 Solutions
Campbell Biology, Books a la Carte Plus Mastering Biology with eText -- Access Card Package (10th Edition)
Ch. 48.1 - Prob. 1CCCh. 48.1 - Describe the basic pathway of information flow...Ch. 48.1 - WHAT IF? How might increased branching of an axon...Ch. 48.2 - Under what circumstances could ions flow through...Ch. 48.2 - WHAT IF? Suppose a cell's membrane potential...Ch. 48.2 - MAKE CONNECTiONS Review Figure 7.10, which...Ch. 48.3 - How do action potentials and graded potentials...Ch. 48.3 - In multiple sclerosis (from the Greek skleros,...Ch. 48.3 - How do both negative and positive feedback...Ch. 48.3 - WHAT IF? Suppose a mutation caused gated sodium...
Ch. 48.4 - Prob. 1CCCh. 48.4 - Some pesticides inhibit acetylcholinesterase, the...Ch. 48.4 - Prob. 3CCCh. 48 - How would severing an axon affect the flow of...Ch. 48 - Suppose you placed an isolated neuron in a...Ch. 48 - Prob. 48.3CRCh. 48 - Prob. 48.4CRCh. 48 - Level 1: Knowledge/Comprehension 1. What happens...Ch. 48 - Level 1: Knowledge/Comprehension 1. What happens...Ch. 48 - Where are neurotransmitter receptors located? (A)...Ch. 48 - Why are action potentials usually conducted in one...Ch. 48 - Which of the following is the most direct result...Ch. 48 - Suppose a particular neurotransmitter causes an...Ch. 48 - WHAT IF? Ouabain, a plant substance used in some...Ch. 48 - Prob. 8TYUCh. 48 - DRAW IT Suppose a researcher inserts a pair of...Ch. 48 - EVOLUTION CONNECTION An action potential is an...Ch. 48 - Prob. 11TYUCh. 48 - WRITE ABOUT A THEME: ORGANIZATION In a short essay...Ch. 48 - Prob. 13TYU
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- In the absence of tension, MscL channel has an energy gap separating the closed and open states Eo = 50 kT. MscL opening is associated with a 20 nm2 in-plane protein expansion (DA). Using Excel plot its open probability (Po) as a function of membrane tension and paste the graph below. What will be the open probabilities of two MscL channels if one situates at the pole of the bacterial cell above, another in the middle?arrow_forwardInvestigating 2 newly discovered unicellular species. Species 1 was isolated from the hot springs with an average water temperature of 92 degrees Celsius. Species 2 was isolated with an average water temperature of 8 degrees Celsius. You extract and measure the amount of desaturase protein from both species. State what you expect to observe with regards to desaturase levels in Species 2 compared to Species 1. (Refer to membrane fluidity and include an explanation of the differences in the structure of fatty acid chains).arrow_forwardMembrane Protein Insertion in the ER This figure displays five small hypothetical proteins. The a-helix secondary structure of the protein is bracketed and the number of amino acids in the helix is indicated. If the hypothetical ER localization sequence is green-yellow-yellow-green-yellow-red, what protein could potentially be a transmembrane protein in the plasma membrane? = Acidic = Basic = Polar (uncharged) O = Hydrophobic CO₂ T 20 CO2 T 20 NH₂ A. T 20 NH₂ B. NH₂ C. T 20 NH₂ D. NH₂ E. tot 10arrow_forward
- Knowledge Check Use of Microscopes You are going to learn how to use the most common type of microscope, the compound light microscope. K The following question will be scored. Which of the following scientific investigations may use a compound light microscope? (check all that apply) Detect the presence or absence of a nucleus (large organelle) in cells of unknown origin. L 9c3/c7405a10-23cb-11ed-b26a-dfb355b4f1e5/c785043... Determine the diversity of microbes in a lagoon to monitor recovery after pollution. Decipher whether snakes detect their prey through sound, smell, sight, touch, or a combination of senses. Identify red blood cells in a patient suspected to have sickle cell anemia, in which red blood cells are sickle shaped. Examine the corona, or protein spikes, on the outside of the COVID-19 (SARS-CoV-2) virus. MacBook Pro SUBMIT ->arrow_forwardCleavage Ligand Precursor Receptor Inactive Receptor Active Cell Membrane 6. The figure above shows a model of a ligand precursor being cleaved to produce an active ligand that binds to a specific receptor. Which of the following is most likely to reduce the binding of the active ligand to its receptor? (A) A change in the cytoskeletal attachment of transmembrane proteins (B) The presence of a large amount of the precursor form of the ligand (C) An increase in the ratio of the number of unsaturated to the number of saturated fatty acid tails of the membrane lipids (D) A mutation in the receptor gene that causes a substitution of a charged amino acid for a nonpolar amino acid in the ligand binding site of the receptorarrow_forward5) Using FRAP (Fluorescence Recovery After Photobleaching), you can measure the diffusion rate of membrane proteins. You attach a fluorescent marker to your protein of interest, bleach a small region of the cell membrane with an intense laser light, and determine the time it takes for the bleached spot to recover fluorescent signal (see figure below). (a) (b) Bleach Laser bleaching of fluorescent marker Fluorescence intensity recovery Recovery Time How would the recovery time of your protein change if the membrane contained a higher concentration of unsaturated fatty acids? Why? How would the recovery time of your protein change if you conducted the experiment at a lower temperature? Why? How would the recovery time of your protein change if it were anchored to the membrane skeleton? Why?arrow_forward
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