In __________________ signaling, a cell-surface-bound signal molecule binds to a receptor protein on an adjacent cell. During embryonic development, for example, such signaling method allows adjacent cells that are initially similar to become specialized to form different cell types. A: endocrine B: contact-dependent C: paracrine D: neuronal

Which of the following would NOT be a function of MHC I? A: display peptides derived from turnover of a cell’s own proteins B: down-regulate the activity of NK cells C: in cross presentation, display pathogenic peptides acquired by phagocytosis D: signal that a red blood cell is old and should be removed and recycled E: bind CD8 when the cell interacts with a Tc cell

Amplification results when an enzyme associated with a signal receptor is activated and, in turn, catalyzes the activation of many molecules of a second enzyme, each of which activates many molecules of a third enzyme, and so on, in a so-called _____________________.

Small molecules which are responsible for intracellular signal<br/>transduction are called( ) A: receptor B: vetor C: transmitter D: first messenger E: second<br/>messenger

A cell's _______ is the entire sequence of nucleotides in an organism’s DNA, which provides a genetic program that instructs the cell how to behave.