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NotesifyChapter 8 · Photosynthesis
8.2 The Light Reactions
Photosynthesis happens in two stages. In the first, the light reactions capture energy from sunlight and store it in two carrier molecules, ATP and NADPH. Water molecules are split, releasing oxygen as a by-product.
Figure 8-6 The light reactions take place in the thylakoid membranes.
Photosystem II absorbs light and energizes electrons, which pass along an electron transport chain to Photosystem I. The energy released pumps H+ ions into the thylakoid space, and ATP synthase uses their flow to make ATP.
Key terms
- Chlorophyll
- Green pigment that absorbs light energy
- Thylakoid
- Membrane sac where the light reactions occur
- NADPH
- Electron carrier used by the Calvin cycle
Think of the light reactions as a solar charger: they turn sunlight into chemical energy the plant can carry around. p. 214
- Chlorophyll absorbs light and excites electrons
- Water is split, releasing O₂
- The energy is stored in ATP and NADPH
Ask anything
Here are 5 questions on the light reactions and the Calvin cycle.
Where do the light reactions take place?
Correct!
Chlorophyll sits in the thylakoid membranes, so that's where light is captured.
Ask anything
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The usual
A separate app per platform, each with its own features and update cycle.
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NotesifyChapter 8 · Photosynthesis
8.2 The Light Reactions
In the first stage, the light reactions capture energy from sunlight and store it in ATP and NADPH.
↑ on the thylakoids!
Think of them as a solar charger: sunlight becomes chemical energy, stored as ATP and NADPH. p. 214
- Chlorophyll absorbs light
- Water is split, releasing O₂
- Energy is stored in ATP
Recent
The usual
Work saved on the device you made it on. Switch screens and it's missing.
In Notesify
Everything lives in your account, so every device sees the same thing.
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Chapter 8 · Photosynthesis
8.2 The Light Reactions
In the first stage, the light reactions capture energy from sunlight and store it in ATP and NADPH.
↑ on the thylakoids!
At a glance#
| Feature | Typical reader | Notesify |
|---|---|---|
| Work on every device and system | No | Yes |
| Same features on every device | Sometimes | Yes |
| Files, highlights, and chats synced across devices | Sometimes | Yes |
| Highlight, draw, and ask on a phone or tablet | Sometimes | Yes |
Sometimes Varies by app or platform
FAQ#
No. Notesify runs in any modern browser on Windows, macOS, Linux, ChromeOS, Android and iOS, on desktops, laptops, tablets and phones. Sign in and your library is there.
Yes. Highlights and pen strokes save to your account as you make them, so they show up on every device you sign in to.
Yes. Chats are saved to your account. Open chat history on any device and pick up the thread where you left it.
Yes. Draw with either on phones and tablets. Strokes are smoothed as you draw, and long-press selects text.