Question

second position
u c a g
first position (5 end)
u uuu phe ucu uau tyr ugu cys u
uuc ucc ser uac ugc c
uua leu uca uaa stop uga stop a
uug ucg uag stop ugg trp g
c cuu ccu cau his cgu u
cuc ccc pro cac cgc arg c
cua leu cca caa gln cga a
cug ccg cag cgg g
a auu acu aau asn agu ser u
auc acc thr aac agc c
aua acg aaa lys aga arg a
aug met start acg aag agg g
g guu gcu gau asp ggu u
guc gcc ala gac ggc c
gua gca gaa glu gga a
gug gcg gag ggg g
initiation termination
which of the following amino acids or punctuation marks are examples of how the genetic code is redundant? select all that apply.
☐ start codon
☐ stop codon
☐ met (methionine)
☐ phe (phenylalanine)
☐ trp (tryptophan)

Explanation:

To determine redundancy in the genetic code (multiple codons for the same amino acid/punctuation):

• Start codon: Only AUG is the start codon (not redundant).
• Stop codon: UAA, UAG, UGA (3 codons for stop – redundant).
• Met (Methionine): Only AUG codes for Met (not redundant).
• Phe (Phenylalanine): UUU and UUC (2 codons – redundant).
• Trp (Tryptophan): Only UGG (not redundant).

So the correct options are stop codon, Phe (phenylalanine).

Answer:

stop codon, Phe (phenylalanine)