Biology

Based on the diagram, "G" is a tubular structure that spans the phospholipid bilayer. The correct answer is: D. Carrier or transport protein

Here's why:

Carrier or transport proteins are integral membrane proteins that span across the entire phospholipid bilayer and often form tubular or channel-like structures. These proteins help transport substances (such as ions, nutrients, or waste products) across the cell membrane.

The other options are not suitable because:

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