What is the order of molecular events that converts a gene into a protein?

What is the order of molecular events that converts a gene into a protein?

• A. DNA is transcribed to RNA, then translated into protein.
• B. DNA directly becomes protein.
• C. The protein is transcribed to RNA.
• D. RNA transcribed to DNA.

Answer: (A)

This question tests how genetic information flows from DNA to a functional protein. The sequence starts with transcription, where DNA is used as a template to produce messenger RNA. Then translation occurs, where the ribosome reads the mRNA and, with the help of transfer RNA, assembles the corresponding amino acids into a polypeptide that folds into a protein. DNA cannot directly become protein because the information must first be transcribed into RNA and then translated into amino acids. The reverse process, RNA transcribed to DNA, is not how gene expression works in cells, and proteins are not transcribed into RNA. So the correct order is DNA to RNA, then RNA to protein.

This question tests how genetic information flows from DNA to a functional protein. The sequence starts with transcription, where DNA is used as a template to produce messenger RNA. Then translation occurs, where the ribosome reads the mRNA and, with the help of transfer RNA, assembles the corresponding amino acids into a polypeptide that folds into a protein. DNA cannot directly become protein because the information must first be transcribed into RNA and then translated into amino acids. The reverse process, RNA transcribed to DNA, is not how gene expression works in cells, and proteins are not transcribed into RNA. So the correct order is DNA to RNA, then RNA to protein.