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What do pyrenoids contain?...

What do pyrenoids contain?

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### Step-by-Step Solution: 1. **Definition of Pyrenoids**: Pyrenoids are spherical protein structures found within the chloroplasts of certain algae and some land plants, particularly hornworts. 2. **Structure**: They are described as subcellular microcompartments, meaning they are small structures within cells that serve specific functions. 3. **Composition**: Pyrenoids contain protein crystals. These protein crystals are significant as they surround a starch sheath, which is another component of the pyrenoid. ...
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