Question

anatomy & physiology protein synthesis

1. complete the table below showing sequences of dna, mrna codons, trna anticodons, and corresponding amino acids. use the list of mrna codons given to assist you in completing this exercise. remember that the genetic code is based on mrna codons.

mrna: uggaagcuauau

dna	a	d	gat	j
trna anticodon	c	uuc	h	k
amino acid	tryptophan	f	i	l

dna is made during (transcription/translation).
dna is made in the (cytoplasm/nucleus).

Explanation:

Step1: Recall base - pairing rules

DNA has bases A, T, C, G; mRNA has bases A, U, C, G; tRNA has bases A, U, C, G. DNA to mRNA: A - U, T - A, C - G, G - C; mRNA to tRNA: A - U, U - A, C - G, G - C.

Step2: Find DNA for tryptophan (UGG in mRNA)

The DNA base - pair for UGG (mRNA) is ACC. So a = ACC.

Step3: Find tRNA anticodon for tryptophan mRNA

The tRNA anticodon for UGG (mRNA) is ACC. So c = ACC.

Step4: Find mRNA for tRNA UUC

The mRNA codon for tRNA UUC is AAG. So e = AAG.

Step5: Find DNA for mRNA AAG

The DNA base - pair for AAG (mRNA) is TTC. So d = TTC.

Step6: Find amino acid for mRNA AAG

The amino acid for AAG (mRNA) is Lysine. So f = Lysine.

Step7: Find mRNA for DNA GAT

The mRNA codon for GAT (DNA) is CUA. So g = CUA.

Step8: Find tRNA for mRNA CUA

The tRNA anticodon for CUA (mRNA) is GAU. So h = GAU.

Step9: Find amino acid for mRNA CUA

The amino acid for CUA (mRNA) is Leucine. So i = Leucine.

Step10: Find DNA for mRNA UAU

The DNA base - pair for UAU (mRNA) is ATA. So j = ATA.

Step11: Find tRNA for mRNA UAU

The tRNA anticodon for UAU (mRNA) is AUA. So k = AUA.

Step12: Find amino acid for mRNA UAU

The amino acid for UAU (mRNA) is Tyrosine. So l = Tyrosine.

Answer:

a. ACC
b. UGG
c. ACC
d. TTC
e. AAG
f. Lysine
g. CUA
h. GAU
i. Leucine
j. ATA
k. AUA
l. Tyrosine