Final answer:
The statement in the question is false. DNA from different species does not have the same average absorbance.
Step-by-step explanation:
The statement in the question is False. DNA from different species does not have the same average absorbance. The concentration of a DNA sample is determined by measuring its absorbance at a specific wavelength, usually 260 nm. The absorbance depends on the concentration of DNA in the sample, the path length of the light passing through the sample, and the specific absorption coefficient of DNA. Biochemists and molecular biologists use an average absorption coefficient of 0.020 ng ¹xmL for double-stranded DNA at its max of 260 nm (notice that concentration in this application is expressed in mass/volume rather than molarity: ng/mL is often a convenient unit for DNA concentration when doing molecular biology).