a. There are three nucleotides in each codon, and eachof these nucleotides can have one of four different bases. How many possible unique codons are there?b. If DNA had only two types of bases instead offour, how long would codons need to be to specify all20 amino acids?

Biology Today and Tomorrow without Physiology (MindTap Course List)
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Chapter7: Gene Expression And Control
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a. There are three nucleotides in each codon, and each
of these nucleotides can have one of four different bases. How many possible unique codons are there?
b. If DNA had only two types of bases instead of
four, how long would codons need to be to specify all
20 amino acids?

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