Which two processes must be balanced (one process exactly equal to the other) in order to maintain a constant number of phospholipids in a cell’s plasma membrane (neither increasing nor decreasing)? receptor-mediated endocytosis and phagocytosis “cell eating” and pinocytosis “cell drinking” and phagocytosis exocytosis and endocytosis phagocytosis and pinocytosis

Which two processes must be balanced (one process exactly equal to the other) in order to maintain a constant number of phospholipids in a cell’s plasma membrane (neither increasing nor decreasing)? receptor-mediated endocytosis and phagocytosis “cell eating” and pinocytosis “cell drinking” and phagocytosis exocytosis and endocytosis phagocytosis and pinocytosis

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 10RQ: Which plasma membrane component can be either found on its surface or embedded in the membrane...

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Eukaryotic membrane fluidity can be increased by which of the following mechanisms? cell bio increasing the number of carbons in the fatty acids of membrane lipids increasing the number of fatty acids attached to glycerol in membrane lipids increasing the number of straight-chain fatty acids of membrane lipids increasing the degree of unsaturation in the fatty acids of membrane lipids increasing the number of membraned organelles in the eukaryotic cell
Eukaryotic membrane fluidity can be increased by which of the following mechanisms? increasing the number of carbons in the fatty acids of membrane lipids increasing the number of fatty acids attached to glycerol in membrane lipids increasing the number of straight-chain fatty acids of membrane lipids increasing the degree of unsaturation in the fatty acids of membrane lipids increasing the number of membraned organelles in the eukaryotic cell
"Which of the following cell processes depend on the movement of membrane components and would not be possible if membranes were rigid, nonfluid structures?" cell movement cell division cell eating (phagocytosis) or cell drinking (pinocytosis) all of the given are not possible with rigid nonfluid structures.
Which of the following cellular activity or function requires the presence of carbohydrates on membranes? for the transport of ions from outside to inside of the cell formation of cell junctions for N- or O-glycosylation cell-cell recognition
Eukaryotic membrane fluidity can be increased by which of the following mechanisms? increasing the number of fatty acids attached to glycerol in membrane lipids decreasing the number of branched chain fatty acids of membrane lipids decreasing the number of carbons in the fatty acids of membrane lipids decreasing the number of membraned organelles in the eukaryotic cell increasing the degree of saturation in the fatty acids of membrane lipids
What happens to phospholipid mobility when the cell is treated with agents that disrupt the underlying membrane skeleton? options: Their mobility is unchanged. Their mobility is increased because the fences that normally restrict their diffusion are removed. Their mobility is decreased because the fences that normally restrict their diffusion are removed. Their mobility is increased because the treatment raises the temperature.
What type of endocytosis moves specific molecules from the extracellular fluid into the cell? Receptor-mediated endocytosis Pinocytosis Phagocytosis Secretion
Eukaryotic membrane fluidity can be decreased by which of the following mechanisms? decreasing the number of fatty acids attached to glycerol in membrane lipids increasing the number of carbons in the fatty acids of membrane lipids increasing the degree of unsaturation in the fatty acids of membrane lipids decreasing the number of membraned organelles in the eukaryotic cell increasing the number of branched-chain fatty acids of membrane lipids
Which of the following molecules would you expect to diffuse through the lipid bilayer of a plasma membrane most slowly, if at all? CO2 O2 CH4-a nonpolar compound A charged molecule Water
Which of the following molecules would you expect to diffuse through the lipid bilayer of a plasma membrane most rapidly? Na+ An amino acid Starch Glucose O2
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 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.