Assignment task: OD600 measurements are used to determine the growth density of a bacterial culture. Which of the following characteristics is not a valid explanation of why this method is useful in determining the number of cells in a culture?
A. The method is based on light scattering
B. Compounds within the bacteria absorb 600 nm light
C. The method can be paired with serial dilution to correlate cell number with optical density
D. The method can underestimate the number of cells relative to OD because it does not distinguish dead and alive cells