Pure RNA has an OD 260 OD 280 ratio of 20. I p a 4 4 displaystyle I frac pi a 4 4 where a is the radius. The number is essentially infinite.
Depending on the nature of the sequence we use one of two methods to calculate T m.
Human DNA is approximately an average of 6 feet 6 inches in total length. How many combinations of DNA can a human embody. The diluted sample gave a reading of 065 on a spectrophotometer at OD 260. RNA can form into double-stranded structures such as during translation when mRNA and tRNA molecules pair.