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

the structure of the plasma membrane is best described as: two layers of phospholipids stacked on top of each other, with proteins embedded in the phospholipids Oa single layer of proteins and polysachharides mixed together two layers of proteins stacked on top of each other O many sheets of peptidoglycan stacked on top of each other O one layer of triglycerides on top of a layer of proteins

Osmosis Water moving by diffusion across a membrane is called osmosis. Remember, diffusion is the movement of molecules from a high concentration to a lower concentration, in order to reach equilibrium. In the image below, the diamonds represent water and the circles represent solutes. Water will move by osmosis from the side with a higher concentration of water to a side with a lower concentration of water. In other words, water will move by osmosis from the side with a lower concentration of solute to the side with a higher concentration of solute. Water is attracted to solutes. 2. Use the following diagram to answer the questions below. Start by filling in the blanks for the missing % concentrations for beakers B and C. 150ml 100 Beaker A 0% Sugar 100% Water a) What is the solute concentration of: O Beaker A? O Beaker B? 150ml 100 Beaker B % Sugar 90% Water b) What is the solvent concentration of Beaker C? 150ml 100 Beaker C 40% Sugar % Water When we think about solutions in human…

The plasma membrane has a hydrophobic interior due to the two present in each phospholipid found in the phospholipid bilayer of the cell membrane. The plasma membrane allows some molecules to cross but not all. Therefore, the plasma membrane is said to be Molecules that are nonpolar and hydrophobic will cross the membrane with ease by Does this process require energy? When molecules move across the plasma membrane by passive transport, they will move down or with the_ from an area of concentration to an area of. concentration. Polar, hydrophilic molecules and charged ions will move across the plasma membrane by the process of_ This does not require energy, but it does require a A special case of diffusion is known as which is the movement of water across the plasma membrane. If a cell is placed into a solution that is hypertonic compared to the inside of the cell, the cell would If a cell is placed into a hypotonic solution compared to the inside of the cell, the cell water. would…