Which of the following is not a step in the response to photon absorption by rhodopsin?

Which of the following is not a step in the response to photon absorption by rhodopsin?


A) Rhodopsin catalyzes GDP/GTP exchange on transducin.
B) Rhodopsin is phosphorylated by rhodopsin kinase.
C) Arrestin binds to the phosphorylated end of rhodopsin.
D) Light absorption converts all-trans¬-retinal to 11-cis-retinal.
E) All-trans¬-retinal is replaced with 11-cis-retinal.

Answer: D


Biology

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