Question

Photosynthesis: Light reactions Linear electron flow 1. Pigments in PSII absorb photons 2. Photons are passed between pigments in a 'wave of excitation' to the reaction centre complex 3. Electrons (e-) are transferred to the Primary electron acceptor 4. Electrons are replaced on the reaction centre complex from H2O releasing O2 and H+ ions 5. Electron transport chain moves 2 e- from photosystem II to I 6. This pumps H+ into thylakoid space 7. Chemiosmosis generates ATP 8. PSI absorbs light and transfers e- to the primary electron acceptor 9. Second electron transport chain moves 2 e- in redox reactions 10. NADP+ is reduced to NADPH Light Light e- e- Pq e- Cyt e- e- e- Fd e- Pc e- e- e- e- 1/2O2 + 2H+ NADP+ reductase H+ H+ H+ H+ H+ H+ H+ ADP + Pi ATP H+ Fill in the blanks and Label with the numbered steps. Label a chlorophyll molecule

          Photosynthesis: Light reactions
Linear electron flow

1. Pigments in PSII absorb photons
2. Photons are passed between pigments in a 'wave of excitation' to the reaction centre complex
3. Electrons (e-) are transferred to the Primary electron acceptor
4. Electrons are replaced on the reaction centre complex from H2O releasing O2 and H+ ions
5. Electron transport chain moves 2 e- from photosystem II to I
6. This pumps H+ into thylakoid space
7. Chemiosmosis generates ATP
8. PSI absorbs light and transfers e- to the primary electron acceptor
9. Second electron transport chain moves 2 e- in redox reactions
10. NADP+ is reduced to NADPH

Light
Light
e-
e-
Pq e- Cyt
e-
e-
e-
Fd
e-
Pc
e-
e-
e-
e-
1/2O2 + 2H+
NADP+ reductase
H+
H+
H+
H+
H+
H+
H+
ADP + Pi
ATP
H+

Fill in the blanks and Label with the numbered steps.
Label a chlorophyll molecule

Show more…

Photosynthesis: Light reactions
Linear electron flow

1. Pigments in PSII absorb photons
2. Photons are passed between pigments in a 'wave of excitation' to the reaction centre complex
3. Electrons (e-) are transferred to the Primary electron acceptor
4. Electrons are replaced on the reaction centre complex from H2O releasing O2 and H+ ions
5. Electron transport chain moves 2 e- from photosystem II to I
6. This pumps H+ into thylakoid space
7. Chemiosmosis generates ATP
8. PSI absorbs light and transfers e- to the primary electron acceptor
9. Second electron transport chain moves 2 e- in redox reactions
10. NADP+ is reduced to NADPH

Light
Light
e-
e-
Pq e- Cyt
e-
e-
e-
Fd
e-
Pc
e-
e-
e-
e-
1/2O2 + 2H+
NADP+ reductase
H+
H+
H+
H+
H+
H+
H+
ADP + Pi
ATP
H+

Fill in the blanks and Label with the numbered steps.
Label a chlorophyll molecule

Added by Kari S.

Biology for AP Courses

Julianne Zedalis, John Eggebrecht

Instant Answer

Solved by Expert Shaiju T

06/14/2022

Step 1

This is represented by the light hitting the green complexes labeled 'PSII' on the left side of the diagram. Show more…

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Photosynthesis: Light reactions - Linear electron flow 1. Pigments in PSII absorb photons. 2. Photons are passed between pigments in a wave of excitation to the reaction center complex. 3. Electrons (e-) are transferred to the primary electron acceptor. 4. Electrons are replaced on the reaction center complex from H2O, releasing O2 and H+ ions. 5. Electron transport chain moves from photosystem II to photosystem I. 6. This pumps H+ into the thylakoid space. 7. Chemiosmosis generates ATP. 8. PSI absorbs light and transfers e- to the primary electron acceptor. 9. Second electron transport chain moves in redox reactions. 10. NADP+ is reduced to NADPH. Fill in the blanks and label with the numbered steps. Label a chlorophyll molecule.

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Transcript

00:01 In the question, we have a diagram here where we can see the light reaction is being seen.

00:09 So it means it's a diagram of thalicoid inside the chloroplast.

00:14 So we have to fill in the blanks and label with the numbered steps.

00:18 So chlorophyll molecule we have to label.

00:20 This is a chlorophyll molecule.

00:23 So you can see the pigments here.

00:26 Now the first number is given about that photosystem 2 will absorb the photon.

00:32 So you can see here, photosystem 2 is going to absorb the photons.

00:39 So let's assume it is as one.

00:43 Second, photons now will acting as, it means the photons are going to get excited and as a wave of excitation, they will be passed on to the reaction center.

00:55 So you can see the photons from various pigments are passed on to the reaction center.

01:01 So one and two will come in this block itself.

01:03 Third is that the electron will be constant to the primary electron acceptor.

01:11 So who is primary electron acceptor? so here is the primary electron acceptor.

01:16 Third one.

01:17 Fourth is the electron which is been replaced in reaction center complex is then going to release the oxygen and hydrogen from the water.

01:27 So this is this fourth step.

01:30 So here the electron is going to get replaced which was lost and which was excited in the first step and due to which there will be the splitting of water molecule releasing oxygen and hydrogen.

01:42 Further, the electron transport chain will move the two electrons from ps2, that is photosystem 2 to 4 system 1.

01:51 So you can see here this is the electron transport chain.

01:54 This is going to move...

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