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13 September, 10:00

DNA is approximately 2.5 nmnm in length. If an average man is 5 ft 10 in. in. tall, how many DNA molecules could be stacked to extend from the ground to the top of the head of an average man?

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  1. 13 September, 12:07
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    7.112 * 10⁸.

    Explanation:

    The length of DNA is 2.5 nm = 2.5 * 10⁻⁹m.

    The average human length = 5 ft 10 in = 70 inch.

    1 inch = 0.0254 m.

    70 inch = 70 * 0.0254 = 1.778 m.

    Number of DNA molecules = length of man / length of DNA.

    Number of DNA molecules = 1.778 m / 2.5 * 10⁻⁹m.

    Number of DNA molecules = 7.112 * 10⁸.

    Thus, the answer is 7.112 * 10⁸.
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