Question

question 3
1 pts
the diameter of the dna spiral helix and the length of one complete turn of the spiral were determined by:
hershey and chases bacteriophage studies
rosalind franklins x - ray diffraction studies
averys enzyme experiments
chargaffs rules
watson and cricks model

Explanation:

• Hershey and Chase's studies confirmed DNA as genetic material via bacteriophage, not DNA structure dimensions.
• Rosalind Franklin’s X - ray diffraction studies provided data on DNA’s helical structure, including diameter and turn length.
• Avery’s experiments showed DNA (not protein) is transforming principle, not about DNA structure dimensions.
• Chargaff’s rules relate to base pairing ratios, not structural dimensions.
• Watson and Crick built the model using Franklin’s data, but the data on diameter and turn length came from Franklin’s X - ray studies.

Answer:

B. Rosalind Franklin’s X - ray diffraction studies