Anabolism:

1. It is a constructive phase of metabolism.

2. In anabolism, complex molecules (e.g. proteins) are synthesized from simple molecules (Amino acids).

3. It is an energy (ATP) requiring process.

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4. e.g. Protein synthesis, Glycogen synthesis.

Catabolism:

1. It is a destructive phase of metabolism.

2. In catabolism, complex molecules (e.g. Glycogen) are broken down into simple molecules (glucose).

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3. It is an energy (ATP) releasing process.

4. E.g. Glycogenolysis, Glycolysis.