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. 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. D The polar hydrophobic groups of each leaflet face outward, toward the aqueous environment on either side of the membrane.

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. 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. D The polar hydrophobic groups of each leaflet face outward, toward the aqueous environment on either side of the membrane.

Concepts of Biology

1st Edition

ISBN:9781938168116

Author:Samantha Fowler, Rebecca Roush, James Wise

Publisher:Samantha Fowler, Rebecca Roush, James Wise

Chapter3: Cell Structure And Function

Section: Chapter Questions

Problem 11RQ: The tails of the phospholipids of the plasma membrane are composed of _____ and are _____? a....

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The 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; hydrophobic
The composition of a cell membrane is not uniform for all types of cells.Some cell membranes are more rigid than others. Rigidity is determinedby a variety of factors, one of which is the structure of the carbon chains in the phospholipids that comprise the membrane. One example of aphospholipid was drawn, and another, having C–C double bonds in its carbon chains, is drawn here. Which phospholipid would be present in the more rigid cell membrane and why?
The phospholipid portion of biological membranes is referred to as "selectively permeable". What does this term mean? What types of substances can cross the phospholipid bilayer? What types cannot?
Which of the following factors would tend to increase membrane fluidity? A greater proportion of unsaturated phospholipids A relatively high protein content in the membrane A greater proportion of saturated phospholipids A lower temperature
Which of the following molecules can normally cross a phospholipid bilayer by simple diffusion? O Oxygen O Potassium ion (K+) O Methionine O Glucose
Which of the following statements are TRUE about the phospholipid bilayer? Select all that apply. Integral proteins have at least one part touching the inner 'tails' of the membrane. Peripheral proteins span the entire membrane. Cholesterol can be used to make the membrane more OR less fluid, depending on the temperature. Glycolipids and glycoproteins face the inside of the cell.
Which of the following statements about the membrane bilayer is FALSE? ccarbohydrate moieties are found on the outer leaflet O glycerophospholipids can move from one layer to the other the composition of glycerophospholipids varies between inner and outer leaflets the outer layer is more negatively charged one side of the bilayer often has more of specific glycerophospholipid than the other layer
The cell membrane is made up of many different kinds of proteins. These proteins can be clannified as either peripheral, transmembrane, or lipid-anchored proteins. Regardiess of their classification, these proteins all play an important role in the function and integrity of a cell. Which of the following properly describes the function of membrane proteins? Select all that apply. View Avalabie Hint(s) to combine with lipids to form strong shels that prevent the movement of substances across the membrane O to allow for cel-cell communication O to provide structural stability for the cell O to provide a seiective barrier O to provide fluidity to the membrane O to combine with a carbohydrate, providing an immune response andbor cell recognition O to serve as a channel for the transport of molecules between extracelular and intracellular fluid
The cytoplasm of a certain cell is composed of a solution that is 98% water, 2% solutes. Consider the solution shown in the beaker in this picture: FOOE OOS Foor solution. [Select] Cytoplasm is 98% water, 2% solutes. The solution in the beaker would be considered when compared to [Select] The plasma membrane is impermeable to solutes. Beaker solution is 98% water, 2% solutes the cell. We would expect that the cell would [Select] if it was placed in the would account for whatever changes might occur to the volume of the cytoplasm of the cell when it is placed in the solution.
Which of the following statements about a typical plasma membrane is correct? The hydrophilic interior of the membrane is composed primarily of the fatty acid tails of the phospholipids. Carbohydrates on the membrane surface are important in determing the overall bilayer structure. Phospholipids are the primary component that determines which solute can cross the plasma membrane. The two sides of the plasma membrane have different lipid and protein composition. The plasma membrane is covalently linked network of phospholipids and proteins that controls the movement of solutes into and out of a cell.
The fluid mosaic model of membrane structure has been very useful in explaining membrane behavior. However, the description of membrane as proteins floating in a phospholipid sea is oversimplified. Describe some components of membrane that are restricted in their lateral motion.
Which of the following is true about phospholipid bilayers? The interior of the layer is highly hydrophilic. The hydrophobic tail faces the cell interior. The polar/hydrophilic tails face the cell interior and exterior. The polar/hydrophilic heads face the cell interior and exterior. The hydrophobic head faces the cell exterior.