Which of the following is true of peptidergic messengers?
A) None act directly, they all require a secondary messenger.
B) They all utilize G-protein-adenylate cyclase in a second messenger system.
C) They all use derivatives of phosphatidylinositol in a second messenger system.
D) None of the above is true.
A
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Of the places listed below, ocean waters generally have the least salinity in ________
A) subtropical zones B) polar regions C) small seas and gulfs D) hot places E) places with lack of rainfall
Which of the following energy sources is thought to drive the lateral motions of Earth's lithospheric plates?
A) swirling movements of the molten iron particles in the outer core B) heat transfer between the earth's interior and the surface of the earth C) gravitational attractive forces of the Sun and Moon D) electrical and magnetic fields localized in the inner core
Why does a good emitter of heat radiation appear black at room temperature?
What will be an ideal response?
Which of the following linkages is found in glycerophospholipids?
A) glycerol-fatty acid-phosphate B) glycerol-phosphate-fatty acid C) phosphate-glycerol-alcohol D) none of the above