Question

Why was the prediction wrong in this case?

1) TTX blocked both R1 and R2
2) TTX blocked only R1
3) TTX blocked only R2
4) TTX did not block any of the receptors

Answer 1

The prediction about TTX blocking both receptors was wrong because the receptors might have different sensitivities or one might not be affected by TTX. The problem requires a review of the receptors' nature and TTX's action.

Step-by-step explanation:

The question involves understanding the effects of Tetradotoxin (TTX) on receptors, presumably in a biological context related to neurophysiology. TTX is a potent neurotoxin that is known to block voltage-gated sodium channels in nerve cell membranes, thereby inhibiting nerve impulse conduction. If the prediction was that TTX would block both receptors R1 and R2, and the outcome was beyond expectations, it might be because R1 and R2 have different sensitivities to TTX, or one of them is not a sodium channel affected by TTX. To elucidate the error in prediction, one would typically revisit the initial assumptions about the nature of these receptors and how TTX's mechanism of action would affect them. As the reference to tetracycline binding might indicate a discussion about drug-receptor interactions, such information would be crucial in understanding what went wrong with the prediction regarding TTX's effect on R1 and R2.