Chapter 21, Problem 109E

The base sequences in mRNA that code for certain amino acids are

Glu:	GAA, GAG
Val:	GUU, GUC, GUA, GUG
Met:	AUG
Trp:	UGG
Phe:	UUU, UUC
Asp:	GAU, GAC

These sequences are complementary to the sequences in DNA.

a. Give the corresponding sequences in DNA for the amino acids listed above.

b. Give a DNA sequence that would code for the peptide trp-glu-phe-met.

c. How many different DNA sequences can code for the tetrapeptide in part b?

d. What is the peptide that is produced from the DNA sequence T–A–C–C–T–G–A–A–G?

e. What other DNA sequences would yield the same tripeptide as in part d?