Question

Protein synthesis is a multistep process. Put the steps of protein synthesis in sequential order.

Answer 1

In protein synthesis, the individual cells build their specific proteins. It is initiated in the cell nucleus and later moves into cell cytoplasm, where the actual process of protein synthesis takes place.

the steps are: initiation, elongation and termination

mRNA(messenger RNA) is the RNA copy of the protein genetic information in DNA molecule produced within the nucleus. it is smaller in size comparing to DNA molecule, which helps them to exit through nuclear pores. Then, it enters to cell cytoplasm thus can interact with the ribosome. when mRNA interacts with one ribosome, it will trigger another RNA molecule approach called transfer RNA(tRNA). After forming a complete ribosome structure, another tRNA molecule approaches. After repeated steps, a chain of amino acids forms and assembled in a protein. depending on the exact composition and order of amino acids in the protein sequence, the chain folds into a three-dimensional shape, a complete protein.

1. the DNA code is transferred by mRNA from the nucleus to the cytoplasm of a cell.

2. Messenger RNA carries the DNA code to the ribosomes, where protein translation occurs.

3. Transfer RNA adds amino acids one at a time according to the mRNA instructions to form a polypeptide chain.

4. Polypeptide chain twists and folds into three- dimensional structure of the intended protein.