What photopigment(s) are in rods?

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Multiple Choice

What photopigment(s) are in rods?

Explanation:
Rods rely on rhodopsin, a light-sensitive pigment formed when the protein opsin binds to the chromophore retinal (11-cis-retinal). This combination is what responds to light and triggers the vision signal in dim conditions. Opsin by itself isn’t the pigment, and photopsin refers to pigments in cones that handle color and bright light. Retinene (retinal) is the component that binds to opsin to form rhodopsin, but on its own it isn’t the complete pigment used by rods. So the correct pigment in rods is rhodopsin.

Rods rely on rhodopsin, a light-sensitive pigment formed when the protein opsin binds to the chromophore retinal (11-cis-retinal). This combination is what responds to light and triggers the vision signal in dim conditions. Opsin by itself isn’t the pigment, and photopsin refers to pigments in cones that handle color and bright light. Retinene (retinal) is the component that binds to opsin to form rhodopsin, but on its own it isn’t the complete pigment used by rods. So the correct pigment in rods is rhodopsin.

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