Chapter 20: Problem 30

a. Write one possible RNA sequence that codes for the following amino acids: aspartic acid-glutamine-tryptophan. b. What is the sequence in a complementary strand of DNA?

Short Answer

Expert verified

A possible RNA sequence that codes for aspartic acid, glutamine, and tryptophan is GAU-CAA-UGG. The complementary DNA strand sequences as CTA-GTT-ACC.

Step by step solution

Identify the codons

For aspartic acid, the RNA codons can be GAU or GAC. For glutamine, the RNA codons can be CAA or CAG. For tryptophan, the RNA codon can only be UGG.

Create an RNA sequence

A possible sequence for aspartic acid-glutamine-tryptophan would be GAU-CAA-UGG, but there are other valid sequences due to the several codons for aspartic acid and glutamine. Let's stick with this sequence.

Finding the DNA complement

The DNA complement of the mRNA sequence would involve replacing uracil (U) with thymine (T), and finding the complement to each base. Remember, A pairs with T, and G pairs with C. Therefore, the DNA complement to GAU-CAA-UGG would be CTA-GTT-ACC.

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a. Write one possible RNA sequence that codes for the following amino acids: aspartic acid-glutamine-tryptophan. b. What is the sequence in a complementary strand of DNA?

Short Answer

Step by step solution

Identify the codons

Create an RNA sequence

Finding the DNA complement

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