The graph illustrates the results of an experiment measuring the amount of DNA per cell in a large groups of cells. Which of the following is the best explanation for the observed results? will give brainliest thanks

in 1972 the fluid—mosaic membrane model of membrane structure was proposed based on thermodynamic principals of organization of membrane lipids and proteins and available evidence of asymmetry and lateral mobility within the membrane matrix [s. j. singer and g. l. nicolson, science 175 (1972) 720–731].

answer; i believe the correct answer is ( proteins );