What's assembled during the second step of protein synthesis

Translation is the second step in protein synthesis. It is shown in Figure below. Translation takes place at a ribosome in the cytoplasm. During translation, the genetic code in mRNA is read to make a protein. In the first step, called transcription, the genetic code in DNA is copied by RNA. In the second step, called translation, the genetic code in RNA is read to make a protein. A mutation is a change in the base sequence of DNA or RNA.

Explanation:

if you mean "where does the second step of protein synthesis occur" then its cytoplasm

if you mean "what is the second step of protein synthesis" then its translation

hope that helped you <3 ;)

nucleus

would be most reasonable answer tbh