Genetic Engineering and Plant Tissue Culture
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Questions and Answers

What did Watson and Crick deduce from the width of the DNA helix?

  • DNA is present in the nucleus of all cells
  • DNA was made up of two strands forming a double helix (correct)
  • DNA was coiled around proteins called histones
  • DNA controls all the chemical changes in cells

    • Who was responsible for the X-ray diffraction photograph of DNA that enabled Watson to deduce the helical structure of DNA?

  • Histones
  • Watson
  • Crick
  • Rosalind Franklin (correct)

    • What did Franklin conclude about the sugar-phosphate backbones of DNA?

  • There were two antiparallel sugar-phosphate backbones (correct)
  • The backbones paired like with like (A with A, and so on)
  • The backbones consisted of basic amino acids
  • The backbones were coiled around histones

    • What did pairing a purine with a pyrimidine result in, according to Watson and Crick?

    <p>A uniform width consistent with the X-ray Structure of DNA</p> Signup and view all the answers

    Where is DNA present in living organisms?

    <p>In the nucleus of all cells</p> Signup and view all the answers

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