Which of the following provides the best indication that light is required for the activation

Prekallikrein is a major participant in the “contact pathway” at least in vitro (see Section 7) and its absence leads to a significantly prolonged APTT.

From: Advances in Clinical Chemistry, 2020

8.2013 #41:Which of the following provides the best indication that light is required for the activationof electron transfer reactions in chloroplasts?(A)Calculating the rate of change of the absorbance for sample 1(B)Comparing the observed results for sample 2 and sample 3(C)Repeating the entire experimental procedure at night(D)Including multiple trials for all the samples

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