For a Better Understanding of DNA Structure, It Helps to Be

For a better understanding of DNA structure, it helps to be able to compare physical characteristics evident from a side view of double-stranded DNA with those of individual base pairs.
A.Use brackets to designate the major and minor grooves on Figure 5-68A and shade in the surface that will be exposed in the major groove in Figure 5-68B.
B.If base pairs were aligned and stacked directly on top of each other, the major and minor grooves would be linear depressions all along the DNA.Explain why this is not the actual conformation of a DNA molecule. (A)


(B)

Figure 5-68