Photosystem I

Q.

What are chromophores?

Q. When does evolution of $O_2$ occur?

1. Non-cyclic photophosphorylation
2. Splitting of water
3. Both b and c
4. Cyclic photophosphorylation

Q. ________ light is absorbed by the reaction centre during light reaction.

1. Blue
2. Red
3. Green
4. Yellow

Q. In Photosystem I the first electron acceptor is

1. Plastocyanin
2. Cytochrome
3. Pastoquinone
4. An Iron sulphur protein

Q.

Solar energy is passed from one pigment to the other until it is concentrated into one particular ______ molecule, the reaction-center chlorophyll.

1. red carotenoid

2. orange carotenoid

3. yellow carotenoid

4. chlorophyll a

Q. Which of the following is a correct feature of photosystems?

1. $P_{700}$is the reaction centre of PS II
   
2. PS I is a pheophytin-quinone type reaction centre
3. Last electron acceptor is Plastoquinone in PS II
4. Photolysis is associated with PS II

Q. In which of the following wavelengths, photosystem-I is inactive?

1. 780 nm
2. 680 nm
3. 690 nm
4. 550 nm

Q. Which of the following is a correct feature of photosystems?

1. $P_{700}$is the reaction centre of PS II
   
2. PS I is a pheophytin-quinone type reaction centre
3. Last electron acceptor is Plastoquinone in PS II
4. Photolysis is associated with PS II