text: i need help with the following equation:? a student dissolved plasmid dna, extracted from bacteria, in 50µl buffer.  she diluted an aliquot 100x and obtained a final absorbance of 0.275 at a wavelength of 260nm and a final absorbance of 0.156 at a wavelength of 280nm. which of the following is correct? a. the total mass of plasmid dna extracted was 68.75µg b. the total mass of chromosomal dna extracted was 68.75µg c. the total mass of plasmid dna extracted was 7800µg d. the total mass of plasmid dna extracted was 1375µg e. the total mass of plasmid dna extracted was 390µg  i would also find it very useful if you could tell me why. thanks. bleedin hard but always guess d or c.  soz but thats above me. plasmids dont have chromosomes so b is out. a plasmid is a circular piece of genetic material but the =of a chromosome in that  species