Which mechanism causes differential gene expression in larval insect instars?

💡 Explanation

When ecdysone levels change post-molting, alteration of ecdysone receptor binding affinity occurs because ligand-dependent transcription factors trigger specific gene responses necessary for the insect's developmental transition through each instar stage. Therefore altered receptor binding affects subsequent larval development, rather than splicing, tRNA modifications, or rRNA methylation which affect general translational or ribosomal processes.

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