Zebetite is a music you hear in the final boss chamber with Mother Brain. While the tune is very short, it has a wonderful aggravating sound that makes it difficult to concentrate on the battle. The name of the track reflects the regenerating energy pillars that you must shoot through to get to Mother Brain.
The song is track 10 on the Game Sound Museum ~Famicom Edition~ 12 Metroid album, and track 85 on the Famicom 20th Anniversary: Original Sound Tracks, Vol. 1 album.