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We have spent a lot of time comparing channelrhodopsin (which is found in Chlamydomonas) with rhodopsin (which is found in humans). What about these two photoreceptors is correct? A. The opsin proteins are homologous and serve as ion channels that transport Ca2+ ions. B. The opsin proteins aren’t homologous, but both species have homologous enzymes involved in retinal synthesis.  C. The opsin proteins aren’t homologous, but they both interact with G proteins, that do share a common ancestry. D. The opsin proteins are homologous, they just fold into very different native conformations.

We have spent a lot of time comparing channelrhodopsin (which is found in Chlamydomonas) with rhodopsin (which is found in humans). What about these two photoreceptors is correct? A. The opsin proteins are homologous and serve as ion channels that transport Ca2+ ions. B. The opsin proteins aren’t homologous, but both species have homologous enzymes involved in retinal synthesis.  C. The opsin proteins aren’t homologous, but they both interact with G proteins, that do share a common ancestry. D. The opsin proteins are homologous, they just fold into very different native conformations.

Biology: The Dynamic Science (MindTap Course List)
Biology: The Dynamic Science (MindTap Course List)
4th Edition
ISBN:9781305389892
Author:Peter J. Russell, Paul E. Hertz, Beverly McMillan
Publisher:Peter J. Russell, Paul E. Hertz, Beverly McMillan
Chapter15: From Dna To Protein
Section15.1: The Connection Between Dna, Rna, And Protein
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We have spent a lot of time comparing channelrhodopsin (which is found in Chlamydomonas) with rhodopsin (which is found in humans).

What about these two photoreceptors is correct?

A. The opsin proteins are homologous and serve as ion channels that transport Ca2+ ions.
B. The opsin proteins aren’t homologous, but both species have homologous enzymes involved in retinal synthesis. 
C. The opsin proteins aren’t homologous, but they both interact with G proteins, that do share a common ancestry.
D. The opsin proteins are homologous, they just fold into very different native conformations. 
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