How many nitrogen bases signal for 4 amino acids

The answer is 12. An amino acid is coded by 3 nucleotide bases referred to as a codon. This genetic information is carried by the messenger-RNA and translated by ribosomes. A tRNA has an anticodon (sequences of 3 nucleotide bases) that are complementary of the respective codon on the mRNA. This is how th tRNA bring in the requisite amino acid for every codon on the mRNA.   

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question: which statement best describes the different properties of metals?

answer: they are shiny and bend without breaking.

since metals have certain characteristics properties, they include the following: they are ductile, malleable, shiny, hard, lustrous, flexible and they are good conductor of heat and electricity. so therefore, metals are not dull and they are not non-flexible as listed. instead, they are shiny and flexible.

hope this , have a good day. c;