Quiz

QUIZ

1. What type of chemical signaling is involved between neurons using neurotransmitters?

a. Autocrine b. Direct cell to cell contact c. Paracrine d. Endocrine

2. What type of cell signaling happens over the longest distances?

a. Autocrine b. Direct cell to cell contact c. Paracrine d. Endocrine

3. What is the main effect of the binding of an intracellular ligand?

a. Induction of transcription of DNA b. Induction of an ion channel c. Change in post-transcriptional modification of proteins d. Binding of two enzymes to make ATP

4. Which type of cell signaling involves plasmodesmata?

a. Paracrine signaling b. Autocrine signaling c. Endocrine signaling d. Cell to cell signaling

5. Which is not an amino acid that can be phosphorylated?

a. Glutamate b. Tyrosine c. Serine d. Threonine

6. What is the end result of the MAP kinase signaling pathway?

a. The MAP gene gets activated b. Proteins get dephosphorylated c. Phosphatases are activated d. Cell division is promoted

7. What is least likely to be a second messenger in a cell?

a. Phosphatidyl inositol b. ATP c. Cyclic AMP d. Calcium ions

8. What happens when a phosphodiesterase enzyme acts on cyclic AMP?

a. It becomes AMP b. It becomes ADP c. It becomes ATP d. It becomes adenosine

9. How many times does the G protein-coupled receptor pass through the cell membrane as part of its structure?

a. Twice b. Four times c. Seven times d. Twelve times

10. What happens when the G protein-coupled receptor gets bound to the protein by the ligand?

a. GDP gets replaced by GTP on the G protein b. An ion channel opens up, allowing calcium to rush in. c. The transmembranous part of the protein gets cleaved into two pieces. d. An enzyme gets activated that draws the ligand into the cell.