Multiple Choice
Viagra causes dilation of blood vessels and increased blood flow to the penis, facilitating erection. Viagra acts by inhibiting which of the following events?
A) hydrolysis of cGMP to GMP
B) hydrolysis of GTP to GDP
C) dephosphorylation of cGMP
D) formation of cGMP from GTP
Correct Answer:

Verified
Correct Answer:
Verified
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