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.
White Keys and the Basic Notes. Here is a piano keyboard diagram with the note names of the white keys, or the basic notes: You can see that the 7 basic notes are repeated over and over. But each time the pitch (how high or low the tone is) is sounding one octave higher (if you go to the right).