BIOLOGY-TEXT
5th Edition
ISBN: 9781260169621
Author: BROOKER
Publisher: MCG
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Textbook Question
Chapter 5, Problem 2TY
Which of the following events can never be energetically favorable in a biological membrane and therefore will not occur spontaneously?
- a. the rotation of phospholipids
- b. the lateral movement of phospholipids
- c. the flip-flop of phospholipids to the opposite leaflet
- d. the rotation of membrane proteins
- e. the lateral movement of membrane proteins
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Students have asked these similar questions
Which 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 nutrients
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
which of the following statements is correct about the movement of water across a plasma membrane
a. it cannot pass through any ion channels
b. it moves through the membrane via mediated transport
c. even though it a polar molecule, it moves readily through the nonpolar lipid bilayer
d. artificial lipid membranes are impermeable to water
Chapter 5 Solutions
BIOLOGY-TEXT
Ch. 5.1 - Core Skill: Modeling The goal of this modeling...Ch. 5.2 - Prob. 1CSCh. 5.3 - Prob. 1CCCh. 5.3 - Prob. 2CCCh. 5.4 - Prob. 1CSCh. 5.4 - Prob. 2CSCh. 5.4 - Lets suppose the inside of a cell has a solute...Ch. 5.5 - What is the purpose of gating?Ch. 5.5 - Prob. 1EQCh. 5.5 - Prob. 2EQ
Ch. 5.5 - Prob. 3EQCh. 5.6 - What is the function of the protein coat?Ch. 5 - Prob. 1TYCh. 5 - Which of the following events can never be...Ch. 5 - Lets suppose an insect, which doesnt maintain a...Ch. 5 - Prob. 4TYCh. 5 - Prob. 5TYCh. 5 - Prob. 6TYCh. 5 - Prob. 7TYCh. 5 - Prob. 8TYCh. 5 - Prob. 9TYCh. 5 - Large particles or large volumes of fluid can be...Ch. 5 - With your textbook closed, draw and describe the...Ch. 5 - Prob. 2CQCh. 5 - Prob. 3CQCh. 5 - Prob. 1COQCh. 5 - With regard to bringing solutes into the cell...
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- Asaparrow_forwardWhich of the following statements are correct about how the complex biological matrix of the cell may affect protein folding, stability and function (select all that appy)? A. ATP tends to "bounce" along the surfaces of many proteins without forming a stable complex B. Proteins make up approximately 30% of the total volume of the cytoplasm in a typical cell C. Compettition between drug molecules and metabolites in the cytoplasm may cause unexpected drug side effects not seen with individual proteins in solution. D. Large protein complexes move faster through the cytoplasm than small metabolites. E. Complex intercations between proteins in the cell may significantly destabilize a protein compared to the isolated protein in waterarrow_forwardElectrical gradients ( potential; charges) exists on cell membranes because in part when the cell is at rest... a.The inner surface surface of the cell membrane is more negatively charged than the outer surface. b. the inner surface of the cell membrane is more positively charged than the outer surface. c. The membrane as a whole is hydrophilic on the outside. d. the membrane as a whole is hydrophobic on the outside e.None of the abovearrow_forward
- Which of the following statements are correct? P. Plasma membrane is highly impermeable to all charged molecules Q. All membrane transport proteins so far known, are transmembrane multipass proteins R. Ionophores operate by shielding the charge of the transported ion so that it can penetrate the hydrophobic interior of the lipid bilayer. S. Na+-K+ ATPase exchanges equal numbers of Na+ and K+ ions in each pumping cycle P and Q R and S P and S Q and Rarrow_forwardWhich of the following is an incorrect description of components of the biological membrane? a. Hydrocarbon tail without carbon-carbon double bonds is saturated with respect to hydrogen. b. The movement of proteins in a bilayer can be monitored using FRAP С. Most of the lipids and some of the proteins cannot move sideways in the plane of the membrane and mostly a lipid may 'flip-flop' across the membrane from one phospholipid layer to the other O d. Cholesterol is a steroid which is wedged between phospholipid molecules of the plasma membranes of animal cells e. A kink in one of the hydrocarbon tails results from the presence of carbon-carbon double bonds and causes increased fluidity of the membranearrow_forwardWhich of the following can most easily pass through the phospholipid bilayer of the cell plasma membrane without the involvement of proteins? A. small non-polar molecules B. small polar molecules C. large non-polar molecules D. large polar moleculesarrow_forward
- An artificial cell consisting of an aqueous solution enclosed by a selectively permeable membrane is immersed in a beaker containing a different solution. The membrane is permeable to water and to the simple sugars glucose and fructose but impermeable to the disaccharide sucrose. Draw solid arrows to indicate the net movement of solutes (glucose and fructose) into or out of the cell. b. Is the solution outside the cell isotonic, hypotonic, or hypertonic to the cell? c. Draw a dashed arrow to show the net movement of water, if any d. Will the artificial cell shrivel, swell, or stay the same?arrow_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_forwardThe 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; hydrophobicarrow_forward
- Which of the following is true about motion of membrane lipids? A. They can move most rapidly when in the gel phase. B. Lateral diffusion is catalyzed by flippase proteins. C. To increase the fluidity of membranes at low temperatures, cells synthesize more saturated fatty acids and fewer unsaturated fatty acids. D. Transbilayer diffusion involves the transfer of lipids from one face of the bilayer to another.arrow_forwardMembrane proteins play the following roles: Select one: a. All of the answers b. Enzymes c. Cell communication d. Transportarrow_forwardAccording 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.arrow_forward
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