The molecular weight of the protein is 48000. Determine the length of the corresponding gene.

1. Protein consists of 48000: 100 = 480 amino acids;
2. One of the chains of the gene carrying the protein program must consist of 480 triplets, or 480 x 3 = 1,440 nucleotides
3. The length of this DNA chain is 1 440 x 0.34 nm = 489.6 nm, the same is the length of the gene (double-stranded DNA region).
Answer: the length of the gene is 489.6 nm.

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