Franklin and Wilkins Analyzed DNA by Bombarding DNA Crystals with X-Rays

question 27

Multiple Choice

Franklin and Wilkins analyzed DNA by bombarding DNA crystals with X-rays. Their analysis yielded two numbers that sparked interest, 3.4 nm and 0.34 nm. What is the significance of these numbers?

• A) It turned out to be just a coincidence.
• B) DNA molecules are 3.4 nm long and 0.34 nm wide.
• C) The width of a DNA molecule is 3.4 nm, whereas the width of a nucleotide monomer is 0.34 m.
• D) These numbers demonstrate there are 10 rungs, or steps, on the DNA "ladder" for every turn of the helix.
• E) The 10 to 1 ratio signifies that DNA molecules are 10 times longer than they are wide.

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Definitions:

Reported by Parents

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Eager to Receive Treatment

A willingness or readiness of individuals to seek and undergo medical or psychological care or therapy.

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A mood disorder in the DSM-5 that is characterized by severe recurrent verbal or behavioural outbursts that are disproportionate to the situation or provocation. This disorder represents a perfect intersect between externalizing and internalizing problems, highlighting once again, the complexity of mental problems in childhood and adolescence.

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