Multiple Choice Questions on Cell Signaling:
1. Cell signaling is __________.
A. Intercellular
B. Intracellular
C. Both (a) and (b)
D. None of the above
Answer: C
2. How many types of cell signaling are there?
A. 1
B. 2
C. 3
D. 4
Answer: C
3. Which of the following signal molecules does not interact with cell surface receptors?
A. Insulin
B. Gastrin
C. Glucagon
D. Testosterone
Answer: D
4. What is a G protein?
A. specific type of membrane-receptor protein
B. protein on the cytoplasmic side of a membrane
C. membrane-bound enzyme
D. relay protein
Answer: B
5. 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
Answer: D
6. What is the largest family of cell surface receptors?
A. G protein-coupled receptors, GPCR
B. Ion channel receptor
C. Nuclear receptor
D. Enzyme-linked receptor
Answer: A
7. Signal amplification is most often achieved by
A. an enzyme cascade
B. binding of multiple signals
C. branching pathways
D. action of adenylyl cyclase
Answer: A
8. The three steps of signal transduction in order are______
A. reception, transduction, response
B. response, transduction, reception
C. reception, response, transduction
D. transduction, reception, response
Answer: A