Question

Drag each tile to the correct box.

Order the steps through which ATP synthesis occurs during the light-dependent reactions of photosynthesis in plants.

Hydrogen ions diffuse across
the thylakoid membrane into the
stroma through ATP synthase.

Electrons move down the electron
transport chain, releasing energy
that pumps hydrogen ions into the
thylakoid space.

ATP synthase uses the energy
released as hydrogen ions move
from regions of high concentration
to regions of low concentration
to make ATP.

The concentration of hydrogen
ions in the thylakoid space increases.

Energy from the Sun ejects electrons
from chlorophyll and splits water
molecules to yield hydrogen ions.


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Answer 1

The sequence is as follows;

1. Energy from the Sun ejects electrons from chlorophyll and splits water molecules to yield hydrogen ions.
2. Electrons move down the electron transport chain, releasing energy that pumps hydrogen ions into the thylakoid space.
3. The concentration of hydrogen ions in the thylakoid space increases.
4. Hydrogen ions diffuse across the thylakoid membrane into the stroma through ATP synthase.
5. ATP synthase uses the energy released as hydrogen ions move from regions of high concentration to regions of low concentration to make ATP.