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Questions and Answers
Who proposed the structure of DNA that included two chains of nucleotides spiraling around each other in a pair of right-handed helices?
Watson and Crick
What was the erroneous proposal by Linus Pauling regarding the composition of DNA?
Linus Pauling suggested that DNA was composed of three nucleotide strands.
In a right-handed helix, which direction does each strand follow as observed from the central axis of the molecule?
Clockwise path
How are the two chains comprising one double helix oriented in relation to each other?
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Where is the -sugar-phosphate-sugar-phosphate- backbone located within the DNA molecule?
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What gives the DNA molecule a large negative charge?
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What are the forces that provide stability for the entire DNA molecule?
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How are the two strands of DNA held together?
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What is the width of the DNA double helix?
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What is the specific pairing rule between pyrimidines and purines in DNA?
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Why are adenine and thymine, as well as guanine and cytosine, the only possible base pairs in DNA?
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What was the result of Chargaff's base composition analysis that was communicated to Watson and Crick?
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