light dependent reactions
chloroplast stroma
thylakoid lumen
dxygen-evolving complex
directions: use the hint below to identify the parts of the light dependent reactions system according to the corresponding letter (hint a below corresponds to the letter a on the diagram)
a. absorbed by the pigments to excite electrons

b. where the light dependent reactions begin

c. where the etc transports the electrons to first, before they are transferred to nadp+

d. rotating protein embedded in the membrane that allows h+ to pass through, the adp it grabs eventually becomes atp

e. this reactant is needed to replace the electrons the chlorophyll lost when it passed them down the etc and when split apart, provides the oxygen we breathe

f. molecule used as the transporter of excited electrons

g. the
ailway\ of the reaction, carries the excited electrons to photosystem i

h. the end product of the joining of a phosphate group to adp through atp synthase

Question

light dependent reactions
chloroplast stroma
thylakoid lumen
dxygen-evolving complex
directions: use the hint below to identify the parts of the light dependent reactions system according to the corresponding letter (hint a below corresponds to the letter a on the diagram)
a. absorbed by the pigments to excite electrons

b. where the light dependent reactions begin

c. where the etc transports the electrons to first, before they are transferred to nadp+

d. rotating protein embedded in the membrane that allows h+ to pass through, the adp it grabs eventually becomes atp

e. this reactant is needed to replace the electrons the chlorophyll lost when it passed them down the etc and when split apart, provides the oxygen we breathe

f. molecule used as the transporter of excited electrons

g. the
ailway\ of the reaction, carries the excited electrons to photosystem i

h. the end product of the joining of a phosphate group to adp through atp synthase

Accepted Answer

### A
# Explanation:
## Step1: Recall light - dependent reaction pigment function
Pigments in photosystems absorb light energy (photons) to excite electrons. So the substance absorbed by pigments to excite electrons is Light Energy (Photons).
## Step2: Match with the diagram's A
In the light - dependent reaction diagram, the part corresponding to A (absorbed by pigments to excite electrons) is Light (Photons).
# Answer: Light (Photons)

### B
# Explanation:
## Step1: Recall start of light - dependent reactions
Light - dependent reactions begin at Photosystem II (PSII). PSII is where the initial absorption of light and electron excitation occurs, and it's the start of the light - dependent reaction process.
## Step2: Match with the diagram's B
The part where the light - dependent reactions begin (corresponding to B in the diagram) is Photosystem II.
# Answer: Photosystem II

### C
# Explanation:
## Step1: Recall Electron Transport Chain (ETC) in light - dependent reactions
In the ETC of light - dependent reactions, after electrons leave Photosystem II, they are first transported to the Cytochrome Complex (or Cytochrome b6f complex) before being transferred to NADP⁺.
## Step2: Match with the diagram's C
The part where the ETC transports electrons to first (corresponding to C in the diagram) is Cytochrome Complex (Cytochrome b6f complex).
# Answer: Cytochrome Complex (Cytochrome b6f complex)

### D
# Explanation:
## Step1: Recall ATP synthesis in light - dependent reactions
ATP synthase is a rotating protein embedded in the thylakoid membrane. It allows H⁺ to pass through its channel, and as H⁺ moves down its concentration gradient, it phosphorylates ADP to form ATP.
## Step2: Match with the diagram's D
The rotating protein embedded in the membrane that allows H⁺ to pass through and converts ADP to ATP (corresponding to D in the diagram) is ATP Synthase.
# Answer: ATP Synthase

### E
# Explanation:
## Step1: Recall reactant for electron replacement in light - dependent reactions
Water (H₂O) is split in the oxygen - evolving complex (associated with Photosystem II). Splitting water provides electrons to replace those lost by chlorophyll, and also releases oxygen (O₂) as a by - product.
## Step2: Match with the diagram's E
The reactant needed to replace electrons lost by chlorophyll and which provides oxygen when split (corresponding to E in the diagram) is Water (H₂O).
# Answer: Water (H₂O)

### F
# Explanation:
## Step1: Recall electron transporter in light - dependent reactions
Plastoquinone (PQ) or other electron carriers? Wait, actually, the molecule that transports excited electrons, especially from Photosystem II, is often represented as the electron carrier, but more specifically, the primary electron acceptor and then carriers like plastoquinone. However, in the context of the light - dependent reaction, the molecule that transports excited electrons (the "carrier") - but also, NADP⁺ is the final electron acceptor, but for the initial transport, the electron carrier chain. Wait, no, the question says "molecule used as the transporter of excited electrons" - the answer is usually the electron carrier, but in the diagram, F is associated with the oxygen - evolving complex? Wait, no, re - reading: E is water, F is the molecule that transports excited electrons. The correct molecule is the electron carrier, and in the light - dependent reaction, the electron is transferred from PSII to the ETC via plastoquinone, but also, the "transporter" - actually, the answer is the electron carrier, but more accurately, the molecule is the one that carries the excited electrons, like the primary electron acceptor and then the electron transport chain components. But the standard answer for this is usually the electron carrier, and in the context of the light - dependent reaction, the molecule is **the electron carrier (e.g., plastoquinone)**, but more precisely, the answer is **the electron carrier** or in the diagram's context, the molecule is **the one that transports electrons**, and the correct answer is **the electron carrier**, but the standard answer for this type of question is usually **the electron carrier** or more specifically, **the primary electron acceptor and then the electron transport chain molecules**, but the most common answer here is **the electron carrier** or **plastoquinone**, but in the context of the diagram, F is associated with the oxygen - evolving complex? No, E is water, F is next. Wait, maybe I made a mistake. Let's re - think: the light - dependent reaction starts at PSII (B), E is water (split to give electrons), F is the molecule that transports the excited electrons. The correct molecule is the **electron carrier** (e.g., plastoquinone) or the **primary electron acceptor** and then the electron transport chain. But the standard answer for this question (common in biology textbooks) is that the molecule that transports excited electrons is the **electron carrier** (and in the diagram, F is likely the electron carrier, so the answer is **Electron Carrier (e.g., Plastoquinone)** or more simply, **the electron - carrying molecule**). But the most accurate answer is **Water**? No, E is water. Wait, no: E is "This reactant is needed to replace the electrons...", which is water. F is "Molecule used as the transporter of excited electrons" - so the answer is the electron carrier, like the one that carries the excited electrons from PSII, which is the **primary electron acceptor** and then the electron transport chain components. But the standard answer here is usually **the electron carrier** or **plastoquinone**, but in the context of the diagram, F is associated with the oxygen - evolving complex? No, the oxygen - evolving complex is E (water). So F is the molecule that transports excited electrons - the answer is **the electron carrier** (e.g., plastoquinone) or **the electron - carrying molecule**, but the correct answer is **the electron carrier** (and in the diagram, F is likely the electron carrier, so the answer is **Electron Carrier** or more specifically, **Plastoquinone**). But I think the intended answer is **the electron carrier** or **the molecule that carries the excited electrons**, and the standard answer is **Electron Carrier (e.g., Plastoquinone)**.
# Answer: Electron Carrier (e.g., Plastoquinone)

### G
# Explanation:
## Step1: Recall the "railway" of the reaction (electron transport chain)
The "railway" that carries the excited electrons from Photosystem II to Photosystem I is the **Electron Transport Chain (ETC)**. The ETC is the series of electron carriers that transfer electrons from PSII to PSI.
## Step2: Match with the diagram's G
The part labeled G in the diagram (the "railway" carrying excited electrons to Photosystem I) is the **Electron Transport Chain (ETC)**.
# Answer: Electron Transport Chain (ETC)

### H
# Explanation:
## Step1: Recall ATP synthesis in light - dependent reactions
When a phosphate group is joined to ADP through ATP synthase, the end product is ATP (Adenosine Triphosphate). ATP synthase uses the energy from the H⁺ gradient to phosphorylate ADP to form ATP.
## Step2: Match with the diagram's H
The end product of joining a phosphate group to ADP through ATP synthase (corresponding to H in the diagram) is ATP (Adenosine Triphosphate).
# Answer: ATP (Adenosine Triphosphate)

Sovi.AI - AI Math Tutor

QUESTION IMAGE

Question

Explanation:

A

Step1: Recall light - dependent reaction pigment function

Step2: Match with the diagram's A

Step1: Recall start of light - dependent reactions

Step2: Match with the diagram's B

Step1: Recall Electron Transport Chain (ETC) in light - dependent reactions

Step2: Match with the diagram's C

Answer:

B