Given a scientific question, generate a correct answer to it.

[Q]: What is at the surface of a cell, arranged in similar bilayer?
[A]: phospholipids

[Q]: Starch and glycogen, as well as simple sugars like glucose and fructose, can all be categorized broadly as what?
[A]: carbohydrates

[Q]: Bases are ionic compounds consisting of hydroxide ions and a what?
[A]:
cation