25-27?

In aqueous solutions with low concentrations of salt, the DNA takes on the _________ conformation. a) A-DNA b) B-DNA c) Z-DNA d) A-DNA or B-DNA e) all of the above Suppose you have a tube containing DNA, but you have accidentally resuspended your DNA in a buffer with an extremely high salt concentration. The DNA takes on the _________ conformation. a) A-DNA b) B-DNA c) Z-DNA d) A-DNA or B-DNA e) all of the above You are doing x-ray diffraction analysis, and you measure DNA that has 12 base pairs per turn and a diameter of 1.8 nm. This DNA is in the ____________ conformation. a) A DNA b) B-DNA c) Z-DNA d) A-DNA or B-DNA e) all of the above In a certain DNA molecule one strand is cleaved and when the complementary strand is rotated at one end. This configuration is called: a) Relaxation b) Supercoiling c) Splicing d) All of the these e) None of the these