Which statements correspond to amphibolic pathways? 1. anabolic and catabolic reactions are joined through common intermediate 2. shared metabolic pathways 3. feedback inhibition can regulate rates of reactions 4. both types of reactions are necessary but do not occur simultaneously

1. anabolic and catabolic reactions are joined through common intermediate

Explanation:

As an example, krebs cycle is an amphibolic pathway.

In the krebs cycle you can see an anabolic reaction: the combination  between acetyl-coa and oxalacetate to obtain cytrate; followed by several catabolic reactions where citrate (with 6 carbon atoms) lose his carbons to obtain oxalacetate again (with 4 carbon atoms).

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