Question

Reaction centre of PS I is ________ and reaction centre of PS II is _________.

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

Answer 1

The correct option is B $P_{700},P_{680}$

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 (PS II) is referred to as $P_{680}$ for comparable reasons.