DNA QUESTIONS

Note if you answer online by typing into the boxes you must print the page - if you click to change page or save the page your answers will be lost - if you print this page with your answers typed in at St Mary's College the answers will appear on the print out (neat!(?)) - I dunno if the same is true elsewhere
 1.  a  Type three differences between DNA and RNA into the box  
     

(3)

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  • DNA is double stranded / RNA is single stranded

  • DNA contains deoxyribose / RNA contains ribose
  • DNA contains thymine / RNA contains uracil

(3)

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b What type of bonds hold the two strands of DNA together?

(1)

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  • hydrogen bonds

(1)

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c Why is replication of DNA described as semi-conservative?

(2)

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  • The original strand of DNA unwinds
  • The new molecule has two strands, one old and one new
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