Question

Reaction centre of photosystem- I in green plants is known as

• A. P660P660
• B. P680P680
• C. $P_{700}$
• D. $P_{690}$

Answer 1

Answer: (C)

$P_{700}$

P${}_{700}$ is the reaction centre for photosystem- I. Its absorption spectrum peaks at 700 nm. When photosystem- I absorbs light, an electron is excited to a higher energy level in the P${}_{700}$ chlorophyll.