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.   

the cells uses some of the atoms of the glucose molecules to atp molecules. the atoms of the glucose molecules will then be converted into energy which will be eventually stored in atp. the energy produced which are stored in atp are coming from the glucose’s chemical bonds.