Question

The human body is said to contain approximately 50.0 grams of DNA in the entire body. If the number of nucleotides in ONE STRAND of DNA is approximately 3.0 x 106, and the average molar mass of a nucleotide is 327 g/mol, what is the average molar mass of an entire DNA double helix?

Answer 1

Answer on Question#69134 – Chemistry – Organic chemistry

Question: The human body is said to contain approximately 50.0 grams of DNA in the entire body. If the number of nucleotides in ONE STRAND of DNA is approximately $3.0 \times 10^{6}$, and the average molar mass of a nucleotide is $327 \, \text{g/mol}$, what is the average molar mass of an entire DNA double helix?

Solution:

$$M(\text{DNA}) = 2 \times 3.0 \times 10^{6} \times 327 \, \frac{\text{g}}{\text{mol}} = 1.96 \times 10^{9} \, \frac{\text{g}}{\text{mol}}$$

The DNA double helix consists of two strands, so we multiply by two.

Answer: $1.96 \times 10^{9} \, \frac{\text{g}}{\text{mol}}$

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