Questions: Multiple Choice Question Gene expression is the production of an RNA molecule or protein. a lipid or nucleic acid. a carbohydrate or protein. a protein or DNA molecule.

The answer is the first one: an RNA molecule or protein.

Explanation for each option:

1. An RNA molecule or protein: This is the correct answer. Gene expression involves the process by which information from a gene is used to synthesize functional gene products, which are often proteins. However, the process also includes the production of RNA molecules, such as mRNA, tRNA, and rRNA, which are crucial for protein synthesis and other cellular functions.

2. A lipid or nucleic acid: This option is incorrect. While nucleic acids (like RNA) are involved in gene expression, lipids are not directly produced as a result of gene expression. Lipids are synthesized through different metabolic pathways.

3. A carbohydrate or protein: This option is incorrect. While proteins are indeed a product of gene expression, carbohydrates are not directly produced through this process. Carbohydrates are synthesized through different metabolic pathways.

4. A protein or DNA molecule: This option is incorrect. While proteins are a product of gene expression, DNA molecules are not produced as a result of gene expression. DNA serves as the template for gene expression but is not a product of it.

In summary, gene expression results in the production of RNA molecules and proteins.