The 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.

The 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.

BIOLOGY:CONCEPTS+APPL.(LOOSELEAF)

10th Edition

ISBN:9781305967359

Author:STARR

Publisher:STARR

Chapter4: Cell Structure

Section: Chapter Questions

Problem 4SA: Cell membranes consists mainly of ________ and ________ . a. lipids; carbohydrates c. lipids;...

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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. phospholipid
The plasma membrane isa. a carbohydrate layer that surrounds groups of cells to protect them.b. a double lipid layer with proteins inserted in it, which surrounds every cell individually.c. a thin sheet of structural proteins that encloses cytoplasm.d. composed of proteins that form a protective barrier.
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.
The plasma membrane consists mainly of: A Proteins embedded in a carbohydrate bilayer B Phospholipids embedded in a protein bilayer C Proteins embedded in a phospholipid bilayer D Proteins embedded in a polymer of glucose molecules
Which of these is not a function of the lipid bilayer? A. Changes the temperature B. Provides a flexible matrix C. Imposes a barrier to permeability
A transmembrane protein in the plasma membrane is glycosylated attwo sites in the polypeptide sequence. Where in this protein would youexpect these two sites to be found?a. in transmembrane segmentsb. in hydrophilic regions that project into the extracellular environmentc. in hydrophilic regions that project into the cytosold. could be anywheree. b and c only
From the image, what is the normal function of the missing structure? A. A lipid bilayer controlling the movement of substances into and out of the cell B. A motor protein that "crawls" along microtubules to contract and release them, which provides movement C. A cytoskeleton element composed of tubulin subunits to provide structure for movement of the cell
Consider 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).
Biologists use the fluid mosaic model to descfibe membrane structure. Which statements about the fluid mosaic structure of a membrane are correct? Select the three correct statements. The framework of a membrane is a bilayer of phospholipids with their hydrophillic heads facing the aqeous environment inside and outside of the cell and their hydrophobic tails clustered in the center. The diverse proteins found in and attached to membranes perform many important functions. Because membranes are fluid, membrane protrins and phospholipids can drift about in the membrane. Membranes include a mosaic, or mix of carbohydrates embedded in a phospholipids bilayer. The kinky tails of some proteins help keep the membrane fluid by preventing the component molecules from packing solidly together.
A transmembrane protein contains a stretch of amino acids that crosses the plasma membrane. The side chains of the amino acids that associate with the phospholipid tails are: A) electronegative B) hydrophobic C) ionic D) polar E) hydrophilic
You make a phospholipid bilayer with short saturated hydro carbon tails. You measure the permeability of this membrane to oxygen and note it is very permeable. You then double the length of the hydro carbon tails, and remeasue membrane permeability. Would you predict that longer hydrocarbon tails increase of decrease permeability? Defend prediction
Cell membranes consists mainly of ________ and ________ . a. lipids; carbohydrates c. lipids; phospholipids b. phospholipids; protein d. phospholipids; ECM