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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When a small amount of oil is added to a beaker of water con
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(with a head and tails) to show the arrangement or orientation of
phospholipids in a micelle.
Draw the structure of oleic acid. How does it influence the membrane properties being part of phospholipids?
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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- 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_forwardDraw the basic structure of a lipid bilayer and label thehydrophilic and hydrophobic regions. Why is the cytoplasmicmembrane a good permeability barrier?arrow_forwardWhich of the following is true about phospholipid bilayers?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_forwardDraw the general structure of a phospholipid.arrow_forward
- When 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_forwardDescribe the structure of a phospholipid and explain which regions of the phospholipid are hydrophobic and which are hydrophilic.arrow_forwardIf you place phospholipids in an oil-based solution, would they still self-assemble into a bilayer? If so, describe its structure.arrow_forward
- What advantage do unsaturated phospholipids have over saturated phospholipids in the lipid bilayer?arrow_forwardBiological membranes are critical components of cells that allow compartmentalisation of cellular contents. The diagram shows a biological membrane comprised of a lipid bilayer with a single polypeptide integrated into the membrane and spanning the membrane seven times. What is the name of the specific type of lipid comprising the bilayer shown above? What properties about the heads and tails of these lipid structures force them to be arranged as they are in the lipid bilayer?arrow_forwardPhospholipids undergo saponification much like triglycerides. Draw the structure of a phospholipid meeting the followingcriteria. Then draw the products that would result from its saponification.(a) a cephalin containing stearic acid and oleic acid (b) a lecithin containing palmitic acidarrow_forward
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