Which food group do enzymes belong?

Answer 1

Enzymes are biological catalysts. They do accelerate reactions, like the splitting of the backbone which connects amino acids in a protein, but come out unchanged in the end. In general, all enzymes are proteins (or slightly modified proteins). But there have now also been examples where RNA can act as biological catalysts, although they usually are referred to as ribozymes (ribonucleic acid + enzyme)