Another quick question about grammar...
"...two large single stranded DNA, which have a low viscosity" (would it be have or has????)
have because you said "two, etc."
Sra
Frankly, one strand or two strands and viscosity have nothing to do with each other. Viscosity is a macroscopic characteristic (ie , trillion trillion trillion trillion molecules), and a strand is microscopic (in ones or twos). So a single strand cannot have viscosity. I would rephrase what you want to say...as a single strand of DNA moves quickly? (low viscosity flows quickly, as viscosity is resistance to flow).
In this case, the correct verb to use is "have."
To understand why, we need to analyze the sentence structure and subject-verb agreement. The subject of the sentence is "two large single stranded DNA." The word "DNA" is technically singular, but in this context, it is being referred to as "two large single stranded DNA," which is considered a plural noun phrase.
When using a plural noun phrase as the subject, we use the plural form of the verb. In this case, the plural form of the verb "have" is correct because "two" indicates a quantity greater than one.
So, the correct form of the sentence is: "...two large single stranded DNA, which have a low viscosity."