Overview
Which of the following statements is true about cell signaling?
(a) In plants, the cell signaling occurs through phytohormones
(b) Cell signaling is used to study the context of human diseases
(c) Cell signaling is used to study the signaling between cells of an organism
(d) All of the above
Which of the following signal molecules is not used for extracellular signaling?
(a) Autocrine
(b) Endocrine
(c) Cyclic AMP
(d) None of the above
Which of the following signal molecules does not interact with cell surface receptors?
(a) Insulin
(b) Gastrin
(c) Glucagon
(d) Testosterone