Question
Biology Question on Photosynthesis in higher plants
Ferredoxin is a constituent of
A
PS I
B
PS II
C
Hill reaction
D
P680-
Answer
PS I
Explanation
Solution
In photosystem-I, the ejected electron is trapped by FRS (ferrodoxin reducing substance) which is an unknown oxidation - reduction system. The electron is now transferred to a non-heme iron protein called ferrodoxin (Fd) from which electron is transferred to NADP+ intermediate protein electron carrier ferrodoxin-NADP reductase. So that NADP+ is reduced to NADPH + H+.