A primary air pollutant is directly from the source and secondary pollutants are omitted from two or more different primary pollutants interact with each other in the atmosphere.
EX of primary: carbon monoxide, nitrogen oxide, sulfur oxid
EX of secondary: NO2 acid rain
Answer:
I don't know the question u are trying to say
It’s C. Amino acids bind to CCA3’OH end of tRNA via ester bond.