Question

Reaction centre of $PSI$ is and reaction centre of $PSII$ is______ .

• A. $P_{680},P_{700}$
• B. $P_{700},P_{680}$
• C. $P_{800},P_{600}$
• D. $P_{700},P_{900}$

Answer 1

Answer: (B)

The reaction center of photosystem $I(PSI)$ is referred to as $P_{700}$, where$"P"$ stands for "Pigment" and $"700"$ stands for the wavelength of light that this particular chlorophyll molecule absorbs most strongly. The reaction center of photosystem $II(PSII)$ is referred to as $P_{680}$ for comparable reasons.