Biology
5th Edition
ISBN: 9781260487947
Author: BROOKER
Publisher: MCG
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Textbook Question
Chapter 5, Problem 3TY
Let’s suppose an insect, which doesn’t maintain a constant body temperature, was exposed to a shift in temperature from 60°F to 80°F. Which of the following types of membrane changes would be the most beneficial in helping the insect cope with the temperature shift?
- a. increase the number of double bonds in the lipid tails of phospholipids
- b. increase the length of the lipid tails of phospholipids
- c. decrease the amount of cholesterol in the membrane
- d. decrease the amount of carbohydrate attached to membrane proteins
- e. decrease the amount of carbohydrate attached to phospholipids
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Students have asked these similar questions
For biological membranes, which of the following statement is NOT true?
A. The phospholipid bilayer is a fluid matrix.
B. Protein can be anchored to the membrane by covalently linked lipid chains.
C. Proteins can move laterally across the membrane.
D. For organisms living in cold temperature, their cell membranes contain more triacylglycerols.
E. Transverse motion of lipid molecules can occur occasionally.
Enzyme lowers when...
A. The energy difference between the substrate and the transition state
B. The energy difference between the product and the transition state
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Which of the following correctly describes the structure of the phospholipid bilayer in plasma
membranes?
The polar hydrophilic groups of each leaflet face outward, toward the aqueous
environment on either side of the membrane.
A
The non-polar hydrophobic groups of each leaflet face inward, toward each other.
The non-polar hydrophilic groups of each leaflet face outward, toward the aqueous
environment on either side of the membrane.
B
The polar hydrophobic groups of each leaflet face inward, toward each other.
The polar hydrophilic groups of each leaflet face inward, toward each each other.
The non-polar hydrophobic groups of each leaflet face outward, toward the aqueous
environment on either side of the membrane.
The non-polar hydrophilic groups of each leaflet face inward, toward each each other.
The polar hydrophobic groups of each leaflet face outward, toward the aqueous
environment on either side of the membrane.
Which 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.
Chapter 5 Solutions
Biology
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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- 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_forwardChoose all that aplly that are TRUE for the lipid bilayer:Negative mark is given to incorrect answer(s). a. The polar head groups of the bilayer are positively charged. b. Individual lipid molecules in one face (monolayer) of the bilayer cannot diffuse (flip-flop) to the other monolayer and must be catalyzed by a lipid transporter called flippase. c. The bilayer is stabilized by covalent bonds between neighbouring phospholipid molecules. d. Polar, but uncharged, compounds readily diffuse across the bilayer. e. Individual lipid molecules are free to diffuse laterally on the surface of the bilayer.arrow_forwardDefine the following terms: a. lipid bilayer b. fluid mosaic model c. membrane fluidity d. flippase e. floppasearrow_forward
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