BIOLOGY
12th Edition
ISBN: 9781260169614
Author: Raven
Publisher: RENT MCG
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Textbook Question
Chapter 5, Problem 4U
The specific function of a membrane within a cell is determined by the
a. degree of saturation of the fatty acids within the phospholipid bilayer.
b. location of the membrane within the cell.
c. presence of lipid rafts and cholesterol.
d. type and number of membrane proteins.
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Students have asked these similar questions
Which of the following statements about cellular membranes is/are FALSE?
A. Only lipids move Within the membrane, while the proteins are anchored and immobile.
B. Membranes are composed of lipids and proteins.
C. Substances may be transported across membranes by active transport, facilitated transport or diffusion.
D. Membrane proteins are classified as integral or peripheral, upon their function
In cell membrane, the regulation of membrane rigidity is the function of _____. While proteins ______
A. Carbohydrates; Cell recognition
B. Cholesterol; Move nutrients and electrolytes across
C. Lipid; Impart polarity to the interior membrane
D. Fatty acids; Prevent tight packing of fatty acid chains
E.Cholesterol; Act as receptors for neurotransmitter and hormone binding
Which of the following statements is true of membrane proteins?
a) They are suspended on the surface of the membrane.
b) They are partly embedded in the bilayer
c) They span across the bilayer and project from both sides
d) Any of these are true, depending on the specific membrane protein.
Chapter 5 Solutions
BIOLOGY
Ch. 5.1 - Prob. 1LOCh. 5.1 - Explain the fluid mosaic model of membrane...Ch. 5.2 - List the different components of phospholipids.Ch. 5.2 - Prob. 2LOCh. 5.2 - Prob. 3LOCh. 5.3 - Illustrate the functions of membrane proteins.Ch. 5.3 - Prob. 2LOCh. 5.3 - Prob. 3LOCh. 5.4 - Compare simple diffusion and facilitated...Ch. 5.4 - Prob. 2LO
Ch. 5.4 - Prob. 3LOCh. 5.5 - Prob. 1LOCh. 5.5 - Prob. 2LOCh. 5.5 - Prob. 3LOCh. 5.6 - Distinguish between endocytosis and exocytosis.Ch. 5.6 - Illustrate how endocytosis can be specific.Ch. 5 - According to the fluid mosaic model, membranes are...Ch. 5 - Prob. 2IQCh. 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 - Prob. 6UCh. 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...Ch. 5 - How are active transport and coupled transport...Ch. 5 - A cell can use the process of facilitated...Ch. 5 - figure 5.5 describes a classic experiment...Ch. 5 - Each compartment of the endomembrane system of a...Ch. 5 - The distribution of lipids in the ER membrane is...
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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_forwardCell membranes consists mainly of ________ and ________ . a. lipids; carbohydrates c. lipids; phospholipids b. phospholipids; protein d. phospholipids; ECMarrow_forwardConsider the following diagram of the cell membrane. Which of the statements is NOT true regarding the cell membrane? Group of answer choices a. Proteins and carbohydrates are also components of the cell membrane. b. Certain phospholipids and proteins on the outer surface of the cell membrane are attached to carbohydrates. c. Some carbohydrates extend through the entire lipid bilayer and appear on both surfaces of the membrane d. Some of the proteins embedded in the cell membrane constitute channels (passage canals).arrow_forward
- a) What are the forces that maintain structural integrity of biological membranes?b) Explain how each force mentioned is formed in membrane lipids. c) Comment on lipid to protein ratio in the membrane of molecules that transport insoluble substances in the blood.arrow_forwardThe 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.arrow_forwardThe smooth endoplasmic reticulum is a. involved in protein synthesis. b. a site of protein glycosylation. c. used to store a variety of ions. d. the site of lipid and membrane synthesis.arrow_forward
- How do bile salts remove excess cholesterol from the body a) Bile salts stabilize deposited cholesterol b) cholesterol is converted to bile salts that are later eliminated through feces. c) Both of these processes remove cholesterol from the body d) None of these processes remove excess cholesterol from the body Which of the following statements is true of cell membrane proteins? a) They are suspended on the surface of the membrane. b) They are partly embedded in the bilayer. c) They span across the bilayer and project from both sides d) Any of these are true, depending on the specific membrane proteinarrow_forwardWhich of the below statements correctly describes the extracellular matrix? a)A layer that facilitates connections and communications with other cells in a tissue b)A gel like substance that resists compression c)All of the other answers are correct d)a complex mix of proteins and polysaccharides.arrow_forwardthe synthesis of carbohydrates takes place at the a. rough endoplasmic reticulum b. ribosomes c. smoother endoplasmic reticulum d. a nuclear membranearrow_forward
- True or False _____ a. the cell membrane is a selectively permeable or semi-permeable structure. _____b. Different proteins found in the membrane play specific roles in cell transport _____c. The lipid bilayer prevents polar molecules from easily passing through _____d. Water molecules cannot pass through the lipid bilayer of the cell membranearrow_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_forwardWhich 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_forward
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