What is the answer to 2x9?

Building glycogen from glucose molecules is an example of what

Most of the carbon on earth is stored in the form of

The current thought on the structure of the cell membrane is: a. a static phosphate sandwich of lipids b. a fluid-mosaic of phospholipids and proteins c. a bilayer of proteins with static lipid molecules d. an impermeable bilayer of protein molecules e. a static and permeable phospholipid single layer