LABORATORY REVIEW
MOLECULAR BIOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Watson&Crick, cardboard models
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Watson&Crick, X-ray diffraction
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Franklin&Wilkins, cardboard models
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Franklin&Wilkins, X-ray diffraction
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Detailed explanation-1: -In mid-March 1953, using experimental data collected mainly by Rosalind Franklin and also by Maurice Wilkins, Watson and Crick discovered the double-helix structure of DNA. Watson and Crick submitted a paper of their discovery to the scientific journal Nature, which was published on April 25, 1953.
Detailed explanation-2: -At King’s College London, Rosalind Franklin obtained images of DNA using X-ray crystallography, an idea first broached by Maurice Wilkins. Franklin’s images allowed James Watson and Francis Crick to create their famous two-strand, or double-helix, model. In 1962 Watson (b.
Detailed explanation-3: -In Watson and Crick’s model, the two strands of the DNA double helix are held together by hydrogen bonds between nitrogenous bases on opposite strands. Each pair of bases lies flat, forming a “rung” on the ladder of the DNA molecule. Base pairs aren’t made up of just any combination of bases.
Detailed explanation-4: -Answer: Watson and Crick defined DNA as a double helix with two long helical strands twisted together in their paper titled A Structure of Deoxyribose Nucleic Acid. According to them, each DNA strand has discrete units known as bases. The bases along one DNA strand match the bases along the other DNA strand.