Which of the following best describes a biological membrane? two layers of phospholipids with proteins embedded between the two layers two layers of phospholipids (with opposite orientations of the phospholipids in each layer) with each layer covered on the outside with proteins two layers of phospholipids with proteins either spanning the layers or on the surface of the layers a fluid structure in which phospholipids and proteins move freely between sides of the membrane a mixture of covalently linked phospholipids and proteins that determines which solutes can cross the membrane and which cannot 0000

Which of the following best describes a biological membrane? two layers of phospholipids with proteins embedded between the two layers two layers of phospholipids (with opposite orientations of the phospholipids in each layer) with each layer covered on the outside with proteins two layers of phospholipids with proteins either spanning the layers or on the surface of the layers a fluid structure in which phospholipids and proteins move freely between sides of the membrane a mixture of covalently linked phospholipids and proteins that determines which solutes can cross the membrane and which cannot 0000

Biology: The Dynamic Science (MindTap Course List)

4th Edition

ISBN:9781305389892

Author:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Publisher:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Chapter5: Membranes And Transport

Section: Chapter Questions

Problem 1TYK: In the fluid mosaic model: plasma membrane proteins orient their hydrophilic sides toward the...

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Cell membranes consists mainly of ________ and ________ . a. lipids; carbohydrates c. lipids; phospholipids b. phospholipids; protein d. phospholipids; ECM
Which 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 membrane
Which of the following provides the most accurate description so far of a cell membrane? The cell membrane is composed of a pure lipid bilayer that is covered entirely by proteins. The cell membrane is composed purely of a lipid bilayer that formed from lipid molecules that have aggregated. The cell membrane is composed of a lipid bilayer with membrane proteins moving freely in the lipid bilayer. O The cell membrane is composed of globular proteins that are covered by the lipid bilayer.
How is the plasma membrane best described? O a phospholipid monolayer with embedded proteins surrounding the cell O a complex of small protein subunits surrounding the cell O a phospholipid bilayer with embedded and surface proteins surrounding the cell O a carbohydrate chain attached to a lipid layer surrounding the cell
Which molecule would you predict moves through a lipid bilayer most rapidly without the help of a transport protein? Group of answer choices A NH2SO2CH3 B C6H12O6 C C2H4 D CH3OH E C2H5OH
What chemical property characterizes the interior of the phospholipid bilayer? O hydrophilic O hydrophobic saturated O polar
Which of the following statements is true about biomembrane? Membrane proteins and lipids are distributed symmetrically in the two leaflets of the bilayer. Lipid-linked proteins are anchored to the bilayer by the lipid moiety that covalently attached to the protein. Lipid molecules can diffuse laterally in each leaflet of the bilayer but they can never flip from one leaflet to another. The fluid mosaic model describes the dynamic arrangement and interaction of proteins but not lipids in membrane. Bilayers are formed by triacylglycerol, glycerophospholipids, and sphingolipids.
Which of the following statement best describes the chemical composition of cytoplasmic membrane? Cytoplasmic membrane is bilayer of phospholipids embedded with proteins Cytoplasmic membrane is composed of two layers- one layer of phospholipids and one layer of proteins. Cytoplasmic membrane is bilayer of proteins embedded with phospholipids
Plasmodesmata in plant cells are most similar in function to which of the following structures in animal cells? Extracellular mix Peroxisomes Desmosomes Tight junctions Gap junctions
Other cell membrane molecules include a compound called __________ , which functions to provide fluidity to rigid membranes and rigidity to fluid membranes; and surface carbohydrates, which function in the membrane not to provide energy, but instead to provide __________ . Aminophospholipids move to the inner leaflet of the membrane, by an enzyme known as the __________ . A main function of the cell membrane is to be very selective as to what is able to cross through, a condition known as a ________ barrier.
Below is the skeletal formula of a molecule typically found in cell membranes. What type of molecule is this and how can you tell? What are the functions of this type of molecule in the plasma membrane of a cell? H HO CH3 CH3 C-H + H-C-H H
All the following is a function of membrane proteins EXCEPT: Cell-cell contact O Protein synthesis Transporting substances cross the membrane O Enzymatic activity which of the following sentences are INCORRECT: All living things are composed of one cells all cells have the same size The cell is the basic structural, O functional, and biological unit of all organisms Robert Hook discovered the cells