All of the following molecules do not usually pass through a cell membrane easily except: O a. Large and charged b. Large and polar. O c. Small and hydrophobic. Od. Small and ionic.
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- Select the statement regarding the plasma membrane that is FALSE (if any). Select one: O a. All living organisms have cells with plasma membranes O b. The phospholipid bilayer has a hydrophobic region and a hydrophilic region. c. Because of the plasma membrane's selectivity permeability, a cell's interior is chemically very different from the surroundings outside. O d. None of the above (meaning all statements are true).In the plasma membrane, form(s) the lipid bilayer,determine(s) the fluid nature of the membrane, andmainly determine(s) the function of the membrane.a. phospholipids, cholesterol, proteinsb. phospholipids, proteins, cholesterolc. proteins, cholesterol, phospholipidsd. cholesterol, phospholipids, proteinse. cholesterol, proteins, phospholipidsIn a cell membrane, which of the following will be able to freely move from one side of the bilayer to the other. Select one: O a. proteins and glycoproteins O b. glycoproteins and lipids O c. lipids O d. lipids and proteins O e. glycolipids and glycoproteins
- Choose which substances cannot pass through the phospholipid bilayer of the plasma membrane. A. Gasses B. Charged molecules C. Hydrophobic molecules D. Lions E. Water F. ATPWhich of the following is NOT a function of membrane proteins? a.Regulate the passage of ions b.Act as carrier molecules for various solutes c.Act as anchors or stabilizers for the cell membrane d.Storage of cellular nutrientsWhich of the following can most easily pass through the phospholipid bilayer of the cell plasma membrane without the involvement of proteins? A. small non-polar molecules B. small polar molecules C. large non-polar molecules D. large polar molecules
- The interface formed between two hydrophobic molecules in the context of the aqueous environment of the cell cytoplasm is formed mostly through: A. Hydrogen bonds B. Covalent bonds C. Van der Waals interactions D. Ionic bonds E. None of the aboveWhich of the following describes integral membraneproteins?a. They permit water movement only into or out of thecell.b. They transport only large proteins into the cell.c. They extend across the phospholipid bilayer.d. They are attached to the external plasma membranesurfaceWhich of the following does NOT contribute to the selective permeability of a biological membrane? a. Specificity of the carrier proteins in the membrane b. Selectivity of channel proteins in the membrane c. Hydrophobic barrier of the phospholipid bilayer d. Hydrogen bond formation between water and phosphate groups
- Which of the following is not a function of the extracellular matrix Select one: A. Prevents the loss of water when cells are placed in a hypertonic solution. B. Assists in the movement of substances across the plasma membrane. C. Has numerous functions that affect the shape and activities of the cell that produced it. D. Takes place in reception of moleculesWhich 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 functionWhich of the following is NOT a component of the cell plasma membrane? A. cholesterol B. proteins C. microfilaments D. phospholipids