Biology
12th Edition
ISBN: 9780134813448
Author: Audesirk, Teresa, Gerald, Byers, Bruce E.
Publisher: Pearson,
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Chapter 5, Problem 3MC
Summary Introduction
Introduction:
There are various numbers of membrane proteins embedded on the surface of phospholipid bilayer of the cell membrane. Glycoproteins are projected by many membrane proteins that bear carbohydrate groups.
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9) Gap junctions are intercellular connections that
A. primarily serve to keep cells separated and allow for transport across a tissue barrier.
B. serve as a regulated cytoplasmic bridge for sharing of small molecules between the cells.
C. serve as a barrier to prevent protein movement within the cellular membrane.
D. are cellular components for constitutive exocytosis that occurs between adjacent cells.
Membrane proteins perform the following functions EXCEPT one. Which
One?
A. form the glycocalyx
B. act as receptor proteins
C. form pores to allow the passage of small solutes
D. behave as enzymes.
Which of the following statements about "leak channels" in the plasma mem-
brane is correct?
A. Proteins that form these channels bind to solutes to allow them to pass into
the cell.
B. They are passageways formed by proteins to allow water and ions to move
passively through the membrane.
C. They allow small ions and molecules to move between adjacent cells.
D. They are formed by glycoprotein and proteoglycans to allow hormones to
enter cells.
Chapter 5 Solutions
Biology
Ch. 5.1 - Vicious Venoms Some of the most devastating...Ch. 5.1 - Prob. 1TCCh. 5.1 - Prob. 2CSCCh. 5.1 - Prob. 1CYLCh. 5.1 - diagram and describe the fluid mosaic model of...Ch. 5.1 - Prob. 3CYLCh. 5.2 - Prob. 1CYLCh. 5.2 - Prob. 2CYLCh. 5.3 - What is likely to have happened If, instead of...Ch. 5.3 - Prob. 1HYEW
Ch. 5.3 - Prob. 2TCCh. 5.3 - If a plant cell is placed in water containing no...Ch. 5.3 - Would a cell over use active transport to move...Ch. 5.3 - Prob. 5TCCh. 5.3 - Prob. 1CYLCh. 5.3 - Prob. 2CYLCh. 5.3 - Prob. 3CYLCh. 5.3 - Prob. 6TCCh. 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 - After each molecule, place the two-word term that...Ch. 5 - Prob. 5FIBCh. 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. 1ACCh. 5 - Predict and sketch the configuration that ten...
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- Chilling most directly affects a. nuclear proteins. b. vacuolar inclusions. c. the cytoskeleton. d. membrane lipids.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_forwardMembrane carriers resemble enzymes except for the fact that carriersa. are not proteins.b. do not have binding sites.c. are not selective for particular ligands.d. change conformation when they bind a ligand.e. do not chemically change their ligands.arrow_forward
- Which statement about the plasma membrane is INCORRECT Select one : a It is composed of two layers of glycoprotein molecules . b. The plasma membranes of adjacent cells may be held together by desmosomes . . It contains receptors for specific molecules d . Gap junctions may be present between adjacent cells eltis selectively permeablearrow_forwardIndicate whether the following statements are true or false. If a statement is false, explain why it is false. a. All types of cells contain cell walls, but only some cell types possess plasma membranes. b. The distribution of specific lipids to the inner and outer leaflet is asymmetrical, or biased, in plasma membranes. C. Lateral diffusion is the movement of lipids from one layer of the membrane to the other. d. Fatty acids tails are used to embed integral, transmembrane proteins in the plasma membrane.arrow_forwardThe carbohydrate chains projecting from the plasma membraneare involved ina. adhesion between cells. c. cell-to-cell recognition.b. reception of molecules. d. All of these are correct.arrow_forward
- Mark the following statements about the plasma membrane as true or false. If a statement is false, correct it to make a true statement. a. _____ Integral membrane proteins generally span the width of the plasma membrane, whereas peripheral proteins are found on only one side of the membrane. b. _____ Cholesterol provides the plasma membrane with stability in the face of changing ion concentrations . c. _____ Membrane cholesterol is vitally important for cell-cell recognition. d. _____ Membrane proteins often function as channels or carriers. e. _____ The overall structure of the plasma membrane is a mosaic with the components locked tightly in placearrow_forwardIntegral proteins associate with the membrane through A. covalent attachment to lipids. B. covalent attachment to lipid anchors such as palmitoyl groups. C. hydrophobic interactions with lipids. D. interactions with carbohydrates attached to lipids.arrow_forwardMalignant tumor cells are characterized by all of the following properties except: A. loss of density-dependent (contact) inhibition B. reliance on aerobic respiration C. reduced dependence on aerobic respiration D. loss of anchorage dependence E. gain of unlimited proliferative potentialarrow_forward
- Plasma membranes are selectively permeable. This means: A. cholesterol cannot enter B. anything can pass in and out C.the membrane regulates the passage of the material in and out of the cell D. glucose cannot enter the cellarrow_forwardWhat kind of domain is involved with intracellular signaling, cytoskeleton remodeling, and are able to bind phosphoinositides with both high affinity and specificity? A. SH2 B. SH1 C. PH D. None of the answers are correct E. SH3 F. Either SH1 or SH2arrow_forwardA. Fill in the blank: The motor protein responsible for transporting vesicles to the plasma membrane is named ____________. (spelling matters!) B. Specific inhibitors of dyneins have yet to be discovered. When they are discovered, how would they most likely affect cells? Reduce retrograde transport of endosomes Decrease pseudopod formation in amoeboid cells Increase cell size Decrease contraction of skeletal musclearrow_forward
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