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A double helix of DNA
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DNA comparisons in Hermit crabs
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Simplified colourful model of DNA structure, front view.
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Three plastic models of the units called nucleotides, the part...
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A plastic model of the typical DNA model in which the nucleoti...
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A model of the base chemical of a nucleotide called Guanine.
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A model of all the various parts that make up a strand of DNA.
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A model of the base chemical of a nucleotide called Cytosine.
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A model of the base chemoical of a nucleotide called Thymine.
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A model of the base chemical of a nucleotide called Adenine.
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A model showing two strands of DNA splitting away from each ot...
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Illustration of a cell, nucleus. chromosome, and histone.
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Spiral illustration of a double helix.
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A protein chain consisting of amino acids arranged in precise ...
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A ribosome moving along a RNA strand.
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