2. In this chapter, you learned that some pathogens must attach to host cells to cause disease. To accomplish this, molecules on their surface (adhesins or ligands) recognize and attach to molecules (receptors or integrins) on the surface on certain host cells.
So a chromatic note, is any note you play that is not in the scale you are playing. They are also a great way to practice, especially if you are going through the pentatonic scale. Try adding one of these outside chromatic notes to your scale, and see how it sounds above the chord you are playing over.
3. Diminished 7th Chords: The notes in a diminished 7th chord are the same as those in a diminished chord, the root, flatted third and flatted fifth. (C dim = C, Eb, Gb) Then the doubly flatted seventh is added; Bbb.