Campbell Biology
12th Edition
ISBN: 9780135188743
Author: Urry
Publisher: PEARSON
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Chapter 36.3, Problem 3CC
MAKE CONNECTIONS → How are the Casparian strip and tight junctions similar (see Figure 6.30)?
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How are the Casparian strip and tight junctions similar?
Membrane 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
10
Select all that apply. This is an image of a plasma membrane, which consists of two layers of phospholipids. The red
bubbles are the hydrophilic heads of phospholipids, facing the cell interior and exterior. The yellow strings facing
inside of the plasma membrane are the fatty acid tails. Which of the following bonds/interactions do you think could
regulate the assembly of the plasma membrane and the adhesion or fatty acid tails to each other? Select all that
apply.
hydrogen bonds
covalent bonds
electrostatic forces
van der Waals forces
hydrophobic force
ionic bonds
O O 0 0 O 0
Chapter 36 Solutions
Campbell Biology
Ch. 36.1 - Why is long-distance transport important for...Ch. 36.1 - Some plants can detect increased levels of light...Ch. 36.1 - WHAT IF? If you prune a plant's shoot tips, what...Ch. 36.2 - If a plant cell immersed in distilled water has a...Ch. 36.2 - Prob. 2CCCh. 36.2 - How would the long-distance transport of water be...Ch. 36.2 - Prob. 4CCCh. 36.3 - Prob. 1CCCh. 36.3 - WHAT IF? Suppose an Arabidopsis mutant lacking...Ch. 36.3 - MAKE CONNECTIONS How are the Casparian strip and...
Ch. 36.4 - Prob. 1CCCh. 36.4 - Prob. 2CCCh. 36.4 - WHAT IF? If you buy cut flowers, why might the...Ch. 36.4 - Prob. 4CCCh. 36.5 - Prob. 1CCCh. 36.5 - Prob. 2CCCh. 36.5 - Prob. 3CCCh. 36.5 - WHAT IF? Apple growers in Japan sometimes make a...Ch. 36.6 - How do plasmodesmata differ from gap junctions?Ch. 36.6 - Prob. 2CCCh. 36.6 - WHAT IF? Suppose plants were genetically modified...Ch. 36 - How did the evolution of xylem and phloem...Ch. 36 - Is xylem sap usually pulled or pushed up the...Ch. 36 - Prob. 36.3CRCh. 36 - Prob. 36.4CRCh. 36 - Prob. 36.5CRCh. 36 - By what mechanisms is symplastic communication...Ch. 36 - Prob. 1TYUCh. 36 - Prob. 2TYUCh. 36 - Prob. 3TYUCh. 36 - Photosynthesis ceases when leaves wilt, mainly...Ch. 36 - Prob. 5TYUCh. 36 - A plant cell with a of -0.65 MPa maintains a...Ch. 36 - Compared with a cell with few aquaporin proteins...Ch. 36 - Prob. 8TYUCh. 36 - EVOLUTION CONNECTION Large brown algae called...Ch. 36 - SCIENTIFIC INQUIRY INTERPRET THE DATA A Minnesota...Ch. 36 - SCIENTIFIC INQUIRY Cotton plants wilt within a few...Ch. 36 - WRITE ABOUT A THEME: ORGANIZATION Natural...Ch. 36 - Prob. 13TYU
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- 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:…arrow_forwardMembrane Structure and E Vocabulary fluid mosaic model glycolipid glycoprotein sterol integ perip AIN IDEA: A biological membrane consists of a bilayer of p ich move around freely within the layer. This is described as t What are the main functions of membranes in cells? What function of normal membranes is impaired in t cystic fibrosis? What problems does this cause?arrow_forwardAll the following processes occur rapidly in the membrane lipid bilayer except (A) Flexing of fatty acyl chains(B) Lateral diffusion of phospholipids (C) Transbilayer diffusion of phopholipids(D) their longaxes Rotation of phospholipids aroundarrow_forward
- Read This! When phospholipids are added to an aqueous environment (consisting mostly of water) the phospholipid molecules will spontaneously assemble into a phospholipid bilayer where the layers are held together by weak attractive forces between molecules. These structures are often seen in nature as cell and organelle membranes. 12. Consider animal cells, which are only bound by a cell membrane and plant cells which are bound by both a cell membrane and a cell wall. Are cell membranes flexible (fluid)? Provide specific examples to support your answer. 13. Explain why a phospholipid bilayer is flexible. terms of the strength of the forces that hold it together. 14. Refer to Model 1. a. What happens to the shape of the hydrophobic tail in a phospholipid when a double bond is present in the carbon chain? b. Explain why the flexibility (fluidity) of a membrane increases when more of the phospholipids in the layers contain double bonds. 15. The diagram below shows the chemical structure…arrow_forwardmolecules of actin could it hold? Assume the cell is spherical The Size of Cells and Their Components (a) If you were to magnify a cell 10,000-fold (typica] of u magnification achieved using an electron microscope), ho ples of Bioch 1. yotic cell with a cellular diameter of 50 µm. (b) If this cell were a muscle cell (myocyte), how many and no other cellular components are present; actin molecules are spherical, with a diameter of 3.6 nm. (The volume of a sphere is %ar.) (c) If this were a liver cell (hepatocyte) of the same dimensions, how many mitochondria could it hold? Assume the cell is spherical; no other cellular components are pre- sent; and the mitochondria are spherical, with a diameter of 1.5 µm. h (d) Glucose is the major energy-yielding nutrient for most cells. Assuming a cellular concentration of 1 mM (that is, 1 millimole/L), calculate how many molecules of glucose would be present in our hypothetical (and spherical) eukaryotic cell. (Avogadro's number, the number of…arrow_forwardName the three major assumptions made by the "Cell theory". (i) The lipid membrane is composed of lipid molecules. Explain the principle of membrane formation highlighting the role of the physical properties of the lipids. (ii) Comparing dimensions and length scales is often a first step in an analysis. Give an approximate value for the thickness of a lipid bilayer and the linear length of a helical turn of a DNA double helix. A technician wants to amplify DNA from a patient sample. However, the lab is not equipped with a thermocycler. (i) (ii) Name two methods for DNA amplification that can be operated at constant temperature and give their acronyms. Explain these two methods in detail using a schematic and name all necessary components that are required to perform the amplification. Describe the main function of the middle ear. Highlight the role of the ossicles and the tympanic membrane.arrow_forward
- Integral membrane proteins... Choose all that could apply are bound to the membrane by only interacting with the phospholipid's polar head O contain many amino acids with hydrophobic residues O contain alpha-helical membrane spanning domains O would not be digested by trypsin in a permeabilized cell O interact with the phospholipid core of the phospholipid bilayerarrow_forward25. Your friend works in a cell biology research lab. She is working she calls p125, because its molecular mass is 125 kiloDaltons. She knows that p125 is a transmembrane protein with three membrane-spanning domains. It has been previously reported that p125 interacts with three other proteins called p175, p80, and p50 (again, polyacrylamide gel). These four proteins in the cell. To determine how these proteins interact with the membrane, you perform a set of experiments in which you first lyse the cells and save some of your lysate, which you run in the input lane (labeled "I" in Figure Q25 below). The lysate is then subjected to a low-speed centrifugation so that you separate out the membrane fraction (which ends up in the pellet, "P") from the cytoplasm (which is in the supernatant, "S"). You then wash the pellet from the first extraction with a high-salt wash that does not disrupt the lipid bilayer, and save a little bit to run on the gel. After the high-salt wash, you centrifuge…arrow_forwardTONICITY DRAG THE WORDS INTO THE BLANK SPACES BEL@W TO ACCURATELY COMPLETE THE PARAGRAPH Hypertonic Isotonic Hypotonic Hypertonic Lsotonic Hypotonic animal cell plant cell A Above are a represented plant cell and an animal cell. Refer to the key on slide 5 and fill in the blanks below. (If you find yourself counting solute dots, you're working much too hard!) Assume that the cell membranes are allow only water (not the solutes) to pass through. Because the cytoplasms of the plant and the animal cell have equal concentrations of solutes, we can say that their cytoplasms are to each other. If we put both the plant and the animal cells into Solution A, we would expect no change in the cells, because Solution A is to the cytoplasm of each cell.arrow_forward
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