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

  • Joined by a sugar phosphate backbone
  • Proteins are made in the cytoplasm, not the nucleus. Genes can’t leave the cell, so a copy of the gene is needed. This copy can leave the nucleus and enter the cytoplasm to be made by the cell

 

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