Biology
10th Edition
ISBN: 9780073383071
Author: Raven
Publisher: MCGRAW-HILL HIGHER EDUCATION
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Textbook Question
Chapter 5, Problem 3U
The transmembrane domain of an integral membrane protein
a. is composed of hydrophobic amino acids.
b. often forms an α-helical structure.
c. can cross the membrane multiple times.
d. All of the choices are correct.
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Ion channels are formed by a particular kind of membrane protein that allows the passage of a specific ion (or ions) under certain conditions. This type of protein is most likely a(n)
a. peripheral membrane protein with additional hydrophobic domains
b. integral membrane protein with a transmembrane domain
c. a cholesterol-like molecule that is positioned in the phospholipid bilayer
d. membrane phospholipid with hydrophilic head group
e. soluble enzyme anchored to a scaffolding protein on the cytoplasmic side of the plasma membrane
Describe the properties of the three classes of membrane proteins (integral, peripheral, and lipid-anchored) along:
A. differences from each other
B. variation among themselves
According to the fluid-mosaic model of the plasma membrane, a.protein and phospholipids form a regular, repeating structure. b.the membrane is a rigid structure. c.phospholipids form a double layer, with the polar parts facing each other. d.proteins are free to move within a double layer of phospholipids.
Chapter 5 Solutions
Biology
Ch. 5 - The fluid mosaic model of the membrane describes...Ch. 5 - What chemical property characterizes the interior...Ch. 5 - The transmembrane domain of an integral membrane...Ch. 5 - The specific function of a membrane within a cell...Ch. 5 - The movement of water across a membrane is...Ch. 5 - If a cell is in an isotonic environment, then a....Ch. 5 - Which of the following is NOT a mechanism for...Ch. 5 - A bacterial cell that can alter the composition of...Ch. 5 - What variable(s) influence(s) whether a nonpolar...Ch. 5 - Which of the following does NOT contribute to the...
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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
- Which of the following describes the fluid mosaic model of the plasma membrane structure? a. The lipid bilayer is solid at body temperature, thus protecting the cell. b. The phospholipid bilayer is embedded with associated proteins, cholesterol and sugars and has a dynamic arrangement. c. The plasma membrane is composed of two layers of proteins embedded with lipids. d. Phospholipids consist of a polar head and a nonpolar tail made of three fatty acid chainsarrow_forwardMembrane 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.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_forward
- What is the primary characteristic of peripheral membrane proteins? A: They cannot be post-translationally modified. B: They span the entire lipid bilayer, sometimes multiple times. C: Detergents or nonpolar solvents are necessary to remove them from the lipid bilayer. D:Weak intermolecular forces keep them attached to the lipid membrane.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_forwardPeripheral proteins are membrane proteins that... a. attach to integral proteins b. insert into the plasma membranec. include glycoproteins on intracellular surfaced. all of the abovee. none of the abovearrow_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_forwardProteins of the plasma membrane carry out all of the following functions except Select one: a. anchoring the cell to external structures. b. transporting substances across the membrane. C. sending and receiving signals to and from other cells. d. binding to DNA to turn on genes. e. catalyzing chemical reactions at the inner or outer surface of the membrane.arrow_forwardProtein X is an unknown membrane protein found in erythrocytes that cannot be extracted from plasma membranes using a concentrated salt solution but can be extracted by detergents. What type of membrane protein is protein X? O A. Protein X is an integral membrane protein. O B. Protein X is an amphitrophic membrane protein. OC. Protein X could be a peripheral membrane protein or an integral membrane protein. D. Protein X is a peripheral membrane protein. O E. Protein X could be a peripheral membrane protein or an amphitrophic membrane protein.arrow_forward
- Transmembrane proteins span the width of the cell membranes. Four types of transmembrane proteins are shown in a section of cell membrane. Although these proteins have different specific functions, they all -- a. help the cell interact with its external environment b. stop chemical reactions within the cell c. synthesize molecules that signal other cells d. remove large waste particles from the cytoplasm of the cell.arrow_forwardWhich 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_forwardwhich 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. waterarrow_forward
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The Cell Membrane; Author: The Organic Chemistry Tutor;https://www.youtube.com/watch?v=AsffT7XIXbA;License: Standard youtube license