Question

ordering question. click and drag on elements in order. place the steps of electron transport in order from beginning to end. instructions. light energy excites electrons in photosystem ii causing a water molecule to split and releasing an electron into the electron - transport system. the excited electrons move from photosystem ii to an electron - acceptor molecule in the thylakoid membrane. the electron - acceptor molecule transfers the electrons along a series of electron - carriers to photosystem i. the electrons lost by photosystem i are replaced by electrons shuttled from photosystem ii. in the presence of light, photosystem i transfers the electrons to a protein called ferrodoxin. ferrodoxin transfers the electrons to the electron carrier nadp+, forming the energy - storage molecule nadph.

Explanation:

Step1: Start with light - energy action

Light energy excites electrons in photosystem II causing a water molecule to split and releasing an electron into the electron - transport system.

Step2: Electron movement

The excited electrons move from photosystem II to an electron - acceptor molecule in the thylakoid membrane.

Step3: Electron - carrier transfer

The electron - acceptor molecule transfers the electrons along a series of electron - carriers to photosystem I.

Step4: Electron replacement

The electrons lost by photosystem I are replaced by electrons shuttled from photosystem II.

Step5: Ferredoxin action

In the presence of light, photosystem I transfers the electrons to a protein called ferredoxin.

Step6: NADPH formation

Ferredoxin transfers the electrons to the electron - carrier NADP+, forming the energy - storage molecule NADPH.

Answer:

1. Light energy excites electrons in photosystem II causing a water molecule to split and releasing an electron into the electron - transport system.
2. The excited electrons move from photosystem II to an electron - acceptor molecule in the thylakoid membrane.
3. The electron - acceptor molecule transfers the electrons along a series of electron - carriers to photosystem I.
4. The electrons lost by photosystem I are replaced by electrons shuttled from photosystem II.
5. In the presence of light, photosystem I transfers the electrons to a protein called ferredoxin.
6. Ferredoxin transfers the electrons to the electron - carrier NADP+, forming the energy - storage molecule NADPH.