FRQ AP BIO UNIT 4 PROGRESS CHECK
PRACTICE SCRIPT 2026 QUESTIONS WITH
SOLUTIONS GRADED A+
>> Signal Amplification
Answer: One ligand activates many effectors
>> Desensitization
Answer: Reduce response after prolonged stimulation
>> Receptor Downregulation
Answer: Internalization and degradation
>> GPCR Desensitization
Answer: β-arrestin binding
>> Feedback Inhibition
Answer: Negative feedback in pathway
>> Positive Feedback
Answer: Amplifies response (e.g., blood clotting)
>> Quorum Sensing
Answer: Bacteria communicate via autoinducers
>> Yeast Mating Factors
Answer: Peptide pheromones
PRACTICE SCRIPT 2026 QUESTIONS WITH
SOLUTIONS GRADED A+
>> Signal Amplification
Answer: One ligand activates many effectors
>> Desensitization
Answer: Reduce response after prolonged stimulation
>> Receptor Downregulation
Answer: Internalization and degradation
>> GPCR Desensitization
Answer: β-arrestin binding
>> Feedback Inhibition
Answer: Negative feedback in pathway
>> Positive Feedback
Answer: Amplifies response (e.g., blood clotting)
>> Quorum Sensing
Answer: Bacteria communicate via autoinducers
>> Yeast Mating Factors
Answer: Peptide pheromones