Concepts of Biology
1st Edition
ISBN: 9781938168116
Author: Samantha Fowler, Rebecca Roush, James Wise
Publisher: OpenStax College
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Textbook Question
Chapter 3, Problem 11RQ
The tails of the phospholipids of the plasma membrane are composed of _____ and are _____?
a. phosphate groups; hydrophobic
b. fatty acid groups; hydrophilic
c. phosphate groups; hydrophilic
d. fatty acid groups; hydrophobic
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Hydrophilic substances cannot pass straight through the plasma membrane due to the ________.
a.
physical size limitations of the bilayer
b.
hydrophobic heads surrounding the bilayer
c.
hydrophobic tails in the center of the bilayer
which one of the following diffuses more readily through the lipid bilayer of a plasma membrane
a. polar molecules
b. non polar molecules
c. ionized molecules
d. water
Choose which substances cannot pass through the phospholipid bilayer of the plasma membrane.
A. Gasses
B. Charged molecules
C. Hydrophobic molecules
D. Lions
E. Water
F. ATP
Chapter 3 Solutions
Concepts of Biology
Ch. 3 - Figure 3.7 What structures does a plant cell have...Ch. 3 - Figure 3.13 Why does the cis face of the Golgi not...Ch. 3 - Figure 3.22 A doctor injects a patient with what...Ch. 3 - When viewing a specimen through a light...Ch. 3 - The ____________ is the basic unit of life. a....Ch. 3 - Which of these do all prokaryotes and eukaryotes...Ch. 3 - A typical prokaryotic cell ________ compared to a...Ch. 3 - Which of the following is found both in eukaryotic...Ch. 3 - Which of the following is not a component of the...Ch. 3 - Which plasma membrane component can be either...
Ch. 3 - The tails of the phospholipids of the plasma...Ch. 3 - Water moves via osmosis _______. a. throughout the...Ch. 3 - The principal force driving movement in diffusion...Ch. 3 - Active transport must function continuously...Ch. 3 - What are the advantages and disadvantages of...Ch. 3 - Describe the structures that are characteristic of...Ch. 3 - In the context of cell biology, what do we mean by...Ch. 3 - Why is it advantageous for the cell membrane to be...Ch. 3 - Why does osmosis occur?Ch. 3 - Where does the cell get energy for active...
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- In the plasma membrane, form(s) the lipid bilayer,determine(s) the fluid nature of the membrane, andmainly determine(s) the function of the membrane.a. phospholipids, cholesterol, proteinsb. phospholipids, proteins, cholesterolc. proteins, cholesterol, phospholipidsd. cholesterol, phospholipids, proteinse. cholesterol, proteins, phospholipidsarrow_forwardWhich of the following is NOT a component of the cell plasma membrane? A. cholesterol B. proteins C. microfi laments D. phospholipidsarrow_forwardWhich of the following is NOT a component of the cell plasma membrane? A. cholesterol B. proteins C. microfilaments D. phospholipidsarrow_forward
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- The plasma membrane is composed of a variety of lipid molecules. 1. Phosphatidylethanolamine 2. Phosphatidylcholine 3. Phosphatidylinositol 4. Phosphatidylserine 5. Sphingomyelin 6. Glycolipids 7. Cholesterol. Which lipids contain sugar molecules?arrow_forwardWhich of the following statements regarding the selective permeability of the lipid bilayer is FALSE? A. the permeability of the lipid bilayer to different substances varies. B. The lipid bilayer component of the plasma membrane is highly permeable to nonvolatile molecules such as oxygen. C. The more hydrophobic or lipid soluble a substance is, the greater the lipid bilayers permeability to that substance. D. The lipid bilayer component of the plasma membrane is moderately permeable to ions and large, uncharged polar moleculesarrow_forwardWhich of the following does not apply to lipid asymmetry? a.It arises in the endoplasmic reticulum. b.It arises due to the flip-flop movement of specific phospholipids to the cytosolic monolayer. c.It is preserved throughout vesicular transport. d.It depends on the activity of flippase.arrow_forward
- The cells of plant seeds store oils in the form of droplets enclosed by membranes. Unlike the membranes you learned about in this chapter, the oil droplet membrane consists of a single layer of phospholipids rather than a bilayer. Draw a model for a membrane around an oil droplet. Explain why this arrangement is more stable than a bilayer.arrow_forwardWhich of the following is NOT a function of membrane proteins? a.Regulate the passage of ions b.Act as carrier molecules for various solutes c.Act as anchors or stabilizers for the cell membrane d.Storage of cellular nutrientsarrow_forwardDescribe ONE modification that could happen to the phospholipids in a membrane that would increase the permeability of the membrane to small non-polar molecules such as oxygen gas. Explain why this modification would increase membrane permeability.arrow_forward
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