Most cell membranes are composed principally of:
A. DNA and ATP.
B. chitin and starch.
C. proteins and lipids.
D. nucleotides and amino acids.
Singer proposed the fluid mosaic model of the cell membrane in which the cell membrane consists of a double lipid layer with proteins embedded in it to act as name tags or to aid in movement of larger molecules across the membrane. DNA is the hereditary information stored in the nucleus and ATP is the energy capturing molecule found throughout the cell. Chitin and starch are large carbohydrates and nucleotides make up DNA while amino acids are the tiniest proteins.