Biochemical analysis of a sample of DNA showed that 40% of the nitrogenous bases was cytosine. What percentage of the base would be adenine?

What would spread (fragmented) bands in the electrophoresis gel tell you about the quality of your DNA? Explain briefly, yet clearly

What is the role of GelRed® in Agarose gel electrophoresis of DNA fragments? Please select the single answer that is most correct GelRed® moves down the agarose gel in response to the electric current and enables visualisation of the position of A the nucleic acids within in the agarose gel. GelRed® intercalates with the Nucleic acid and, under UV light, fluoresces to enable visualisation of the position of the nucleic acids in the agarose gel. GelRed® intercalates with the Nucleic acid and enables visualisation of the position of the nucleic acids in C the agarose gel. GelRed® intercalates with the amino acids in the agarose gel and enables visualisation of the position of their in D the agarose gel.

At 260 nm what component of DNA absorbs at this nm(hydrogen bond, phosphate backbone, nitrogenous base, deoxyribose).