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When genes are expressed, at what point do molecules move from storing information to being metabolically and structurally functional molecules?

Question

When genes are expressed, at what point do molecules move from storing information to being metabolically and structurally functional molecules?

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Solution

The process of gene expression involves two main stages:

  1. Transcription: This is the first step in gene expression. It involves the process of copying the DNA sequence of a gene into a similar molecule known as RNA (specifically messenger RNA or mRNA). This process is carried out by an enzyme called RNA polymerase. The mRNA molecule carries the genetic information from the DNA in the nucleus to the cytoplasm of the cell.

  2. Translation: This is the second step in gene expression. The mRNA molecule is used as a template to build a protein in a process called translation. This process is carried out by a complex molecular machine called a ribosome. The ribosome reads the sequence of the mRNA molecule and uses it to assemble amino acids into a polypeptide chain, which then folds into a functional protein.

So, to answer your question, molecules move from storing information (in the form of DNA) to being metabolically and structurally functional molecules (in the form of proteins) during the process of gene expression, specifically during the translation stage.

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