6. which of the following discoveries provided a critical clue to watson and crick in solving the structure of dna? (1 point)
the hershey-chase experiment
griffith’s transformation experiment
chargaff’s base ratios
miescher’s isolation of dna
7. a dna strand with the sequence a-t-t-g-c-t would be complementary to which of the following? (1 point)
t-a-t-g-g-a
t-a-a-c-g-a
c-a-a-t-a-g
g-c-c-a-t-c
8. dna from one species differs from the dna of another species in its (1 point)
base ratios
sugars
phosphate groups
all of the above