Codons UCA, UCG, UCU, UCC, AGC, and AGU code for the amino acid serine. What do these codons indicate? 

A. that the genetic code is universal 

B. that the genetic code is degenerate 

C. that UCA is the initiator codon 

D. that all amino acids are coded by six codons

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B. that the genetic code is degenerate 

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