What happens next after the hormone glucagon binds to a G-protein coupled receptor (GPCR)?
A. The glucagon enters the cell through the GPCR and diffuses to the nucleus where it interacts with transcription factors.
B. The G-protein loses GDP and gains GTP becoming activated.
C. The G-protein loses GTP and gains GDP becoming activated.
D. The G-protein loses GTP and gains GDP becoming inactivated.
E. The G-protein loses GDP and gains GTP becoming inactivated.
Answer: B
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