Which of the following polymers provides protection in the plasma membrane?
a. proteins
b. lipids
c. starches
d. nucleic acids

b. . Lipids

Lipid polymers provides protection in the plasma membrane.Approximately 20-80% of the cell membrane is composed of lipids, the rest, is made up of protein. The lipid layer of the membrane gives it flexible and permeable characteristic. While the protein part assists in transport of molecules it needs to survive.

1.0 mol per dm^3 sodium chloride solution

Explanation:

The idea behind this question is that the water inside the potato stick would move into the surrounding liquid naturally if the density outside the stick is greater than it is inside. Therefore, the liquid that would most encourage the flow of water from the potato stick would be the moet dense liquid- which in this case, is 1.0 mol per dm^3 sodium chloride solution.