Photosystem I

Q. Choose the correct statement.

1. Only PS II is functional in non-cyclic photophosphorylation.
2. PS I and PS II are named in the sequence in which they function during the light reaction.
3. Splitting of water occurs at PS I.
4. PS I and PS II are named in the sequence of their discovery.

Q.

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

1. orange carotenoid

2. red carotenoid

3. chlorophyll a

4. yellow carotenoid

Q.

In Photosystem I the first electron acceptor is:

1. An iron-sulphur protein
2. Plastocyanin
3. Cytochrome
4. Plastoquinone

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

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

Q. In photosystem I, the fist electron acceptor is:

1. Ferredoxin
2. Cytochrome
3. An iron sulphur protein
4. Plastocyanin

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

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

Q. The absorption peak of photosystem I and photosystem II is at

1. 580 nm and 600 nm, respectively
2. 640 nm and 660 nm, respectively
3. 680 nm and 700 nm, respectively
4. 700 nm and 680 nm, respectively

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

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

Q. Which of the following photosystems is present in stroma lamellae?

1. PS1
2. PS2
3. PS1 and PS2
4. None of the above

Q. In PS I, the reaction centre chlorophyll has

1. maximum absorption at 700nm
2. maximum absorption at 600nm
3. maximum absorption at 680nm
4. maximum absorption at 780nm