Question

Which is not involved in protein synthesis?

• A.
  Termination
• B.
  Initiation
• C.
  Transcription
• D.
  Elongation

Answer 1

The correct option is C

Transcription
Protein synthesis
The formation of protein from mRNA takes place through the process of translation. Translation refers to the process of polymerisation of amino acids to form a polypeptide. It includes three steps like initiation, elongation and termination.
1.Initiation- During chain initiation first the mRNA binds with the smaller subunit of ribosome, then the aminoacylated tRNA binds and finally the larger subunit of ribosome binds.
2.Elongation- Elongation is the second step in the translation process where polymerisation of amino acids leads to the formation of a polypeptide. Elongation is accompanied by the movement of ribosomes along the mRNA.
3.Termination- Termination is the last process in translation. This happens when the stop codon (UAA, UGA, UAG) in the mRNA enters the A site of the ribosome.

Transcription
The formation of the mRNA using one strand of DNA as a template is called transcription. This happens in the nucleus of eukaryotes. The mRNA produced enters the cytosol where translation happens. This process does not directly lead to protein synthesis.