A light-capturing unit in a chloroplast’s thylakoid membrane that has two molecules of P680 chlorophyll a at its reaction center. (It is called P680 because this pigment is best at absorbing light having a wavelength of 680 nm).Group of answer choicesPEP carboxylaseprimary electron acceptorphotosystemrubiscoreaction-center complex
Question
A light-capturing unit in a chloroplast’s thylakoid membrane that has two molecules of P680 chlorophyll a at its reaction center. (It is called P680 because this pigment is best at absorbing light having a wavelength of 680 nm).Group of answer choicesPEP carboxylaseprimary electron acceptorphotosystemrubiscoreaction-center complex
Solution
The answer is photosystem. This is because a photosystem is a complex of proteins and pigments (including chlorophyll) that are involved in photosynthesis. In this case, the photosystem contains two molecules of P680 chlorophyll a at its reaction center, which is best at absorbing light with a wavelength of 680 nm.
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