Textbook Question
Considering the information on B- and Z-DNA and right- and left-handed helices, carefully analyze structures (a) and (b) below and draw conclusions about their helical nature. Which is right-handed and which is left-handed?
7. DNA and Chromosome Structure
Alternative DNA Forms
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Rosalind Franklin’s X-ray diffraction studies of DNA revealed two distinct structural forms depending on hydration. Which two forms did she identify?
A
A-DNA and Z-DNA
B
C-DNA and D-DNA
C
B-DNA and Z-DNA
D
A-DNA and B-DNA
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