23. What is gene expression?

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To control or manage something, in this case, the process of gene expression.
To make a written or typed copy of something, in this case, DNA into RNA.
The process by which information from a gene is used to create a functional product.
Large molecules made up of chains of amino acids that perform various functions.

The correct option is: The process by which information from a gene is used to create a functional product.

Gene expression refers to the process by which the information stored in a gene is used to create a functional protein or a functional RNA molecule. This process involves several steps, including transcription (the synthesis of an RNA molecule using DNA as a template) and translation (the synthesis of a protein using the information encoded in RNA). Gene expression is vital for the proper functioning of cells and is responsible for determining various traits and characteristics of an organism.