<prompt> Light conves retinene to:11 cis11 trans13 cis13 trans  <response>: In the dark, the retinene1 in rhodopsin is in the 11-cis configuration. The only action of light is to change the shape of the retinene, conveing it to the all-trans isomer. Ref: Ganongs Review of Medical Physiology 23rd edition, Chapter 12. 