In biochemistry|lang=en terms the difference between mrna and degradosome

is that mrna is (biochemistry) messenger rna while degradosome is (biochemistry) a multi-protein complex, present in most bacteria, that is involved in the degradation of mrna.

As an initialism mrna

is (biochemistry) messenger rna.

As a noun degradosome is

(biochemistry) a multi-protein complex, present in most bacteria, that is involved in the degradation of mrna.