Biology: Life on Earth with Physiology (11th Edition)
11th Edition
ISBN: 9780133923001
Author: Gerald Audesirk, Teresa Audesirk, Bruce E. Byers
Publisher: PEARSON
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Chapter 5, Problem 2RQ
Summary Introduction
To determine:
The configuration when ten phospholipid molecules would assume when placed in water and also explain why they arrange in this configuration.
Introduction:
Phospholipids are a type of lipids that contain phosphate group which are the important component of cell membranes. A phospholipid contains fatty acid and phosphate group in which fatty acids are hydrophobic tails and phosphate group forms the hydrophilic head.
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a) List the constituents of phospholipids. b) Phospholipid molecules were suspended in a mixture made up of water/oil. Describe the molecular arrangement that will occur and provide explanation for the arrangement of the molecules in the aqueous/oil mixture environment and its application in cell membrane functions
When a small amount of oil is added to a beaker of water con
phospholipids, the phospholipids will surround the oil droplets forming
micelles. Draw several cartoon representations of phospholipid molecules
(with a head and tails) to show the arrangement or orientation of
phospholipids in a micelle.
A) Briefly describe the basic structure of phospholipids and explain how they can provide an effective barrier against the unregulated movement of molecules into or out of cells.
B) Not all phospholipids are identical to one another. Describe two components (parts) of that can be altered to create variation between different phospholipids.
Chapter 5 Solutions
Biology: Life on Earth with Physiology (11th Edition)
Ch. 5.1 - Prob. 1CYLCh. 5.1 - diagram and describe the fluid mosaic model of...Ch. 5.1 - Prob. 3CYLCh. 5.1 - Researchers have recently discovered ion channels...Ch. 5.1 - Vicious Venoms Some of the most devastating...Ch. 5.1 - Vicious Venoms Most snake venoms are nasty...Ch. 5.2 - Prob. 1CYLCh. 5.2 - Prob. 2CYLCh. 5.2 - Prob. 3CYLCh. 5.2 - Prob. 1TC
Ch. 5.2 - Prob. 2TCCh. 5.2 - If a plant cell is placed in water containing no...Ch. 5.2 - Would a cell over use active transport to move...Ch. 5.2 - Prob. 5TCCh. 5.2 - Prob. 1HYEWCh. 5.3 - Prob. 1CYLCh. 5.3 - explain how these junctions function and provide...Ch. 5.3 - Prob. 1TCCh. 5 - Animal cells are surrounded by________ fluid is...Ch. 5 - Which of the following cannot enter a cell by...Ch. 5 - Prob. 3MCCh. 5 - Prob. 4MCCh. 5 - Prob. 5MCCh. 5 - Prob. 1FIBCh. 5 - A membrane that is permeable to some substances...Ch. 5 - Prob. 3FIBCh. 5 - Prob. 4FIBCh. 5 - After each molecule, place the two-word term that...Ch. 5 - Prob. 6FIBCh. 5 - Prob. 1RQCh. 5 - Prob. 2RQCh. 5 - What are the five categories of proteins commonly...Ch. 5 - Prob. 4RQCh. 5 - Define hypotonic, hypertonic, and isotonic. What...Ch. 5 - Describe the following types of transport...Ch. 5 - Prob. 7RQCh. 5 - Prob. 8RQCh. 5 - Prob. 9RQCh. 5 - Prob. 1ACCh. 5 - Predict and sketch the configuration that ten...
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- The following figure shows a typical phospholipid. Suppose this molecule was incorporated into a cell membrane. Which letter indicates the portion of the molecule that would be exposed to the aqueous environment? CH₂ I H₂C-N¹-CH₂ CH₂ A H₂C H₂C H₂C CH₂ CH₂O HO CH ₂ H₂C H₂C CH₂ OH HO O–CH, H₂C H₂C H₂C CH₂ HC CH₂ CH₂ CH-O CH-OH H₂C CH₂ H₂C CH₂ H₂C/ H₂C H₂C H₂C H₂C CH₂ H₂C CH₂ CH₂ CH₂ CH₂ CH₂ CH₂ CH₂ H₂C/arrow_forwardWhen a water droplet is placed in an oil solution, the phospholipids will form a micelle as shown. Explain why the phospholipids become organized in this way. Oil Waterarrow_forwardDraw the basic structure of a lipid bilayer and label thehydrophilic and hydrophobic regions. Why is the cytoplasmicmembrane a good permeability barrier?arrow_forward
- How many phospholipid molecules are there in a 1-μm region of a phospholipid bilayer membrane? Assume that a phospholipid molecule occupies 70 Å of the surface area.arrow_forwardExplain why phospholipids have a natural tendency to self-assemble into a bilayer. Why is this biologically important?arrow_forwardDescribe the structure of a phospholipid and explain which regions of the phospholipid are hydrophobic and which are hydrophilic.arrow_forward
- Draw the general structure of a phospholipid.arrow_forwardPhospholipids form the main fabric of the plasma membrane. One feature of phospholipids is that when they are placed in an aqueous solution, they will self-assemble into a double layer (bilayer) that resembles the bilayer of the plasma membrane. This self-assembly occurs because phospholipids are hydrophilic at one end (the phospholipid head) and hydrophobic at the other end (the phospholipid tails). Drag the labels to their appropriate locations in the figure. 1. First, drag labels of Group 1 to targets (a) and (b) to indicate whether these environments are hydrophilic or hydrophobic. 2. Next, drag the phospholipid layers (Group 2) to targets (c) and (d) to indicate how they are oriented in the plasma membrane. 3. Finally, drag labels of Group 1 to targets (e), (f), and (g) to indicate which portions of the membrane protein are hydrophilic and which are hydrophobic. Group 1 extracellular hydrophobic fluid © hydrophilic plasma membrane Group 1 Group 2 (f membrane protein Group 1 Group…arrow_forwardWhen viewed by electron microscopy, the lipid bilayer is often described as looking like a railroad track. Explain how the structure of the bilayer creates this image.arrow_forward
- What advantage do unsaturated phospholipids have over saturated phospholipids in the lipid bilayer?arrow_forwardIf you place phospholipids in an oil-based solution, would they still self-assemble into a bilayer? If so, describe its structure.arrow_forwardThe following is a block diagram for a glycerophospholipid where the building blocks are labeled with letters and the linkages between building blocks are labeled with numbers. ____________ 5. Which building blocks are glycerol residues? ____________ 6. Which building blocks are phosphate residues? ____________ 7. Which linkages involve an alcohol residue? ____________ 8. Which linkages involve both glycerol and fatty acid residues?arrow_forward
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