Key enzymes of such anaerobic catabolic pathways are corrinoid and Fe-S cluster-containing, membrane-associated reductive dehalogenases. These enzymes catalyze the reductive elimination of a halide and constitute the terminal reductases of a short electron transfer chain.

Is catabolism oxidative or reductive?

Metabolic processes all involve oxidation and reduction which are opposites. For every oxidation there is also a reduction occurring somewhere else. Exchange of electrons always occurs!!! Catabolism - oxidation, degradation, breaking of covalent bonds, release of energy (Exergonic) .

Are catabolic pathways biosynthetic?

These biosynthetic processes are critical to the life of the cell, take place constantly, and demand energy provided by ATP and other high-energy molecules like NADH (nicotinamide adenine dinucleotide) and NADPH (Figure 1). ... Catabolic pathways are those that generate energy by breaking down larger molecules.