Monday 20 May 2013

3.15 describe a DNA molecule as two strands coiled to form a double helix, the strands being linked by a series of paired bases: adenine (A) with thymine (T), and cytosine (C) with guanine (G)

DNA resembles a ladder (that has been twisted,) on either side of each rung will be a base- they are a base pair: either adenine (A) with thymine (T) or cytosine (C) with guanine (G).

ghr.nlm.nih.gov
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2 comments:

  1. Mike Tsang26 June 2017 at 04:38

    The Biology Syllabus has changed…

    Here is a New blog for the 2017 Syllabus:

    http://igcse-biology-2017.blogspot.hk

    ReplyDelete
  2. SophieRice27 June 2017 at 06:19

    more at

    http://igcse-biology-notes.blogspot.hk/2017/06/315-describe-dna-molecule-as-two.html

    ReplyDelete

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