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DNA Unzipped

The DNA double helix contains two sequences of nucleotide code letters that run along the molecule. Untwist the spiral and DNA can be seen as two parallel strands; that’s why it’s sometimes called the double helix. Unzip the strands and you have two linear sequences of the letters A, C, G, and T. The precise […]

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Cancer, How Cancer Starts, How Cancer Spreads, Where and Why, Animation.

The number of cells in a tissue is determined by the balance between cell division and cell death. Uncontrollable cell division leads to formation of abnormal growths called tumors. Tumors can be benign or malignant. Benign tumors are slow-growing and constrained by surrounding connective tissue so they do NOT spread to other organs. They can […]

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Tumor Growth

Cell division is essential for healthy growth of an organism and complex genetic mechanisms have evolved to switch cell division on and off at the proper time for normal development. Cancer happens when cells divide uncontrollably and produce a growing lump or tumor. Tumors give out chemical signals that prompt the growth of blood vessels […]

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