AT&T; LTE 8:55 AM * 93% Done 4 of 4 17 I8. Which of the lwing NOTe (d) Dis-olved

Question

AT&T; LTE 8:55 AM * 93% Done 4 of 4 17 I8. Which of the lwing NOTe (d) Dis-olved g… 19-22. Which process in sachpai is 1ely to ccr more nqity 22. (a) response to acety lcholline OB ) esonse to testoserome 23. Which of the following statements is tre? (a) Extracellular r signal molecules than are hydropilis munt bind to lceecep to (b) To function, all extracelilular signal e) A cell-surface receptor capable of binding enly one type of signal moecule can meiate only 24. Which of the following statements about molecular switches is false (a) Phosphatases remove the phosphate from GTP on GTP-binding petcins, turnsing them off (b) Protein kinases transfer the terminal phosphate from ATP onto a peotein st common types of protcin kinase (d) A GTP-binding protein exchanges ns bound GDP for GTP to become ctivaed. 25. The following happens when a cell-surface receptor activates a G protein. (a) The B subunit exchanges its bound GDP for GTP (b) The GDP bound to the a subunit is phosphory lated to foem bound GTP (d) It activates the a subunit and inactivates the py complex Match the target of the G protein with the appropriate signaling outcome (a) cleavage of inosnol phospholipids chans in than one substrate 26. adenylyl cyclase 27. ion channels 28. phospholipase C ice in signaling ira- 29. A protein kinase can act as an inmegrating dev (a) (b) (c) phosphorylates more catalyzes its own is activated by two or more by two or in different phosphory ation cascade involving two or more protein kinases

Explanation / Answer

25.When a cell surface receptor activates a G protein then the beta subunit exchanges its bound GDP for GTP.

26. Adenylyl cyclase:increase in cAMP level.

27. Ion channels: change in membrane potential.

28.Phospholipase C: cleavage of inositol phospholipids

29.A protein kinase can act as an integrating device in signaling if it phoshorylates more than one substrate.

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