Which of the Following Statements About the Molecular Events of Photoreception

question 81

Multiple Choice

Which of the following statements about the molecular events of photoreception is false?

• A) A single photon can excite a rhodopsin molecule.
• B) In a well-lit setting, most of the sodium channels of a rod cell are open.
• C) cGMP keeps the sodium channels open.
• D) Activated phosphodiesterase (PDE) catalyzes the reaction hydrolyzing cGMP into GMP.
• E) Activated transducin activates PDE.

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