Transduction of light

Transduction of light

(i) The retina has photoreceptor cell, the cone and rod that contain photo-pigment called rhodopsin

(ii) Rhodopsin contains a protein called opsin and a light sensitive molecule or chromophore; retinal an aldehyde of         vitamin A.

(iii) When retinal is struck by light, retinal changes from cis to trans form. the change triggers electrical impulse to               the brain

(iv) Retinal in cis form it then regenerated.

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