Gene expression is influenced by several factors, including:
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Chemicals in the body: Certain hormones, nutrients, and signaling molecules can regulate gene expression.
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The brain: Neural signals can impact gene expression, particularly in relation to behavior and development.
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Senescence: Aging can affect gene expression patterns, influencing how genes are activated or silenced over time.
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Protein synthesis: The process of protein synthesis itself can also have feedback mechanisms that regulate gene expression.
So, all the provided responses can play a role in determining gene expression. Would you like to know more about any specific factor?