Question

help answer all these please

23- Requires Respondus LockDown Browser Mar 8 at 9:58pm z Instructions z may only be accessed with the Respondus Lockdown Browsere. If you are in another browser (Chrome, Safari, Opera, Explorer, etc.), please close it andre through the Respondus Lockdown Browsere. If you do not already have the Respondus Lockdown Browsere, please follow this linke to download. Question 8 1 pts Two aqueous solutions are separated by a selectively permeable membrane that allows water to pass through but does not allow starch to pass through Solution A is 10% starch and solution B is 5% starch. What will occur? Water will diffuse from solution A to solution B. Water will diffuse from solution B to solution A. Starch will diffuse from solution A to solution B. Starch will diffuse from solution B to solution A. Both water and starch will diffuse from solution B to solution A. Next • Previous Submit No new data to save. Last checked at 12:31am

Answer 1

Ans.

8.b.water will diffuse from solution B to solution A.

because in osmosis water move from low concentration of solute (solution B- 5% starch) to high concentration of solute(solution A-10% starch) through semipermeable membrane.

9.c.The individual phospholipid molecules are not bonded to one another,so the movement of certain proteinand lipids is possible within the bilayer

self explanatory

10.c.Unsaturated fatty acid

unsaturated fatty acids has high melting point which helpto resist freezing of membrane.It depends on unsaturated fatty acid to saturated fatty acid ratio.more the ratio more will be the resistance to freezing.

11.false

carrier proteins can transport ions and molecules either passively through facilitated diffusion(toward gradient high to low conc.), or via secondary active transport (against gradient low to high conc.).

12.e.active transport

In neuron Na+/K+ pump- its pumping of ions against their gradients requires the addition of energy from an outside source.

13.d.Active transport

ATP provides energy to move molecules against its gradient.

14.e.bilayer,with the fatty acid pointing toward one another.

lipid is hydrophoblic in nature which is present inward of plama membrane bilayer toward one another to prevent contact with water.

15.a.phospholipid

the majority of cases phospholipids are the most abundant, often contributing for over 50% of all lipids in plasma membranes.