Building block molecules for biosynthetic pathways come from the cell's catabolic pathways and from the environment.

Question

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Building block molecules for biosynthetic pathways can come from the breakdown of other molecules within the cell (catabolism), but they can also come from the environment. For example, plants take in carbon dioxide and convert it into glucose via photosynthesis, which can then be used to build other molecules.

Building Block Molecules for Biosynthetic Pathways Come from the Cell's