Question

chargaffs rule allows us to determine... *
how much dna is present in a sample
the viscosity of dna
the amount of remaining bases given the amount of one base
if dna is in double helix form

Explanation:

Chargaff's rule states that in DNA, the amount of adenine (A) equals the amount of thymine (T), and the amount of guanine (G) equals the amount of cytosine (C). So, if the amount of one base is known, the amounts of the remaining bases can be determined. It has nothing to do with DNA quantity, viscosity, or double - helix confirmation directly.

Answer:

C. the amount of remaining bases given the amount of one base