The peptidoglycan cell wall of bacteria is most analogous to

chain link fence

Peptidoglycan could be found in high number on gram positive cell walls. The structure of peptidoglycan looks like a cross link which makes it sturdy, so rain coat would be false. It is not an impenetrable brick wall because it still allow some ion and food pass through it.  Sugar candy coat sounds good but chain link fence would be better.

answer; /// i believe the correct answer is (thrombocytopenia); (a)

answer; polycythemia is the correct answer;