Photosystem I

Q. Stroma lamellae membrane lacks

1. PS I only
2. PS II only
3. PS I and electron carriers
4. PS II and NADP reductase

Q.

In Photosystem I the first electron acceptor is:

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

Q. PEPcase and RuBisCO in C4 plants are present respectively in

1. cytoplasm and thylakoids
2. stroma and cytoplasm
3. stroma and thylakoids
4. cytoplasm and stroma

Q. Each photosystem in LHC has all the pigments except

1. one molecule of chlorophyll a
2. one molecule of chlorophyll b
3. one molecule of chlorophyll c
4. one molecule of chlorophyll d

Q. Aleuroplasts, amyloplasts and elaioplasts stores ________ , __________ and __________ respectively

1. Lipids, Proteins, Carbohydrates
2. Proteins, Lipids, Carbohydrates
3. Carbohydrates, Proteins, Lipids
4. Proteins, Carbohydrates, Lipids

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.

Question 40
Complete the flow chart for cyclic photophosphorylation of the photosystem-I.

Q.

What is the difference between NADH and FADH2?

Q. Write a short note on cyclic photophosphorylation

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

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

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

Q.

Why is P680 called so?

Q. Read the assertion and reason carefully to mark the correct option in question.

Assertion: $PSI$ and $PSII$ are named in sequence of their function during the light reaction or photochemical phase.

Reason: Each photosystem has one molecule of chlorophyll a forming a light harvesting complex called antenna.

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. By looking at which internal structure of a plant can you tell whether a plant is C3 or C4?

1. Mesophyll cells only
2. Chloroplast dimorphism
3. Kranz anatomy
4. Both chloroplast dimorphism and Kranz anatomy

Q. The first electron carrier molecule from $P_{700}$ to $NAD{P}^{+}$ is believed to be:

1. Cytochrome
2. Cu protein/Plastocyanin
3. FeS protein/Ferredoxin
4. Fe-Mg protein

Q. In Photosystem I the first electron acceptor is

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

Q. Which of the following is present on stroma lamellae and has reaction center P${}_{700}$?

1. PS II
2. Cyt b${}_6$f complex
3. PS I
4. ATP synthase

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. In the below schematic diagram, which is plastocyanin?

1. C
2. D
3. A
4. B

Q. what is the volume of o2 liberated at stp conditions when 10 ml of perhydrol is decomposed

Q. The most effective wavelength of visible light in photosynthesis is in the region

1. violet
2. blue
3. yellow
4. red

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. Which one is the final electron carrier

1. Cytochrome oxidase
2. OAA
3. $NAD{P}^{+}$
4. Pyruvate

Q. In photosystem-$I$ the first electron acceptor is

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

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

Q. The water potential and osmotic potential of pure water are

1. 100 and 200
2. 100 and 0
3. 0 and 0
4. 0 and 100

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

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

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

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