◉ BioQuestAP BIOLOGY
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EXPEDITION 7 / 8 · COLLEGE BOARD UNIT 6

Gene Expression and Regulation

Information flow and gene control

Your pace. Your study mode.80 flashcards · 20 MCQs

EXPLORE & EXPERIMENT

Balance RNA production and breakdown

Change transcription and RNA degradation. Watch how mRNA abundance approaches a steady state.

mRNA abundance (arbitrary units)

Balance RNA production and breakdown05010015020007.51522.530Time (min)Steady-state abundance: 40.0 RNA units
Model & assumptions

dm/dt = s − dm; m(t) = (s/d)(1 − e⁻ᵈᵗ)

Idealized constant transcription and first-order degradation, starting with no mRNA. Translation, cell division, and regulatory feedback are not modeled.

Original BioQuest teaching models. Explore the OpenStax Biology reference. Gene regulation · Oxidative phosphorylation