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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The plasma membrane is said to be a fluid-mosaic model because it contains
a. waxes suspended within a mosaic of phospholipids.b. a mosaic of proteins suspended within a phospholipid bilayer.c. a polysaccharide mosaic suspended within a protein bilayer.d. a mosaic of phospholipids suspended within a protein bilayer.
Elastic nature of plasma membrane is due to the presence of
(a) lipids
(b) proteins
(c) carbohydrates
(d) water
What is NOT a function of the plasma membrane? a. isolate the cell from its surroundings b. communication with other cells c. catalyze macromolecules into subunits d. structural support
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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- Which plasma membrane component can be either found on its surface or embedded in the membrane structure? a. protein b. cholesterol c. carbohydrate d. phospholipidarrow_forwardThe plasma membrane isa. a carbohydrate layer that surrounds groups of cells to protect them.b. a double lipid layer with proteins inserted in it, which surrounds every cell individually.c. a thin sheet of structural proteins that encloses cytoplasm.d. composed of proteins that form a protective barrier.arrow_forwardExplain the structure of cell membrane. If it is not bi-layer (only one layer of lipid) what may happened?arrow_forward
- Which of these is not a function of the lipid bilayer? A. Changes the temperature B. Provides a flexible matrix C. Imposes a barrier to permeabilityarrow_forwardWhich is incorrect about the plasma membrane? a. It has a hydrophobic interior and hydrophilic region that faces water. b. Cholesterol affects the fluid nature of the membrane. c. Proteins embedded in the lipid bilayer do not move. d. It surrounds all living cellsarrow_forwardWhat would happen if the plasma membrane were madeprimarily of a hydrophilic substance such as carbohydrate? Which of the major themes at the end of chapter 1does this point best exemplify?arrow_forward
- Which of these cell junctions are open channels that connect the cytoplasm of adjoining plant cells? A. Adhering junctions B. Tight junctions C. Gap junctions D. Plasmodesmataarrow_forwardWhen cellular transport through the plasma membrane must be provided with energy in form of ATP to power the transport process, what is this called? A. Selective permeability B. Passive transport C. Active transport D. Diffusionarrow_forwardWhich statements are consistent with the fluid-mosaic model of membranes? (a) All membrane proteins are bound to the interior of the membrane. (b) Both proteins and lipids undergo transverse (flip-flop) diffusion from the inside to the outside of the membrane. (c) Some proteins and lipids undergo lateral diffusion along the inner or outer surface of the membrane. (d) Carbohydrates are covalently bonded to the outside of the membrane. (e) The term mosaic refers to the arrangement of the lipids alone.arrow_forward
- What would probably happen to the plasma membrane of a cell if it were composed of hydrophilic molecules such as carbohydrates?arrow_forwardWhat structure cannot be found in ALL cells? Explain why A. Mitochondria B. DNA C. Cell membrane D. Cytoplasm F. Ribosomesarrow_forwardWhich of the following is Not a function of the plasma membrane proteins? A. Acting as enzymes B. Acting as channels C. Acting as carriers D. Stabilizing temperaturearrow_forward
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