Question

Photosensitive compound in human eye is made up of -

• A. Opsin and Retinal
• B. Opsin and Retinol
• C. Transducin and Retinene
• D. Guanosine and Retinol

Answer 1

The Correct Option is A

The photosensitive compound in the human eye is crucial for vision. Let's break down the components and determine the correct combination.

1. Understanding the Photosensitive Compound:
   • The photosensitive compound in the human eye is known as rhodopsin.
   • Rhodopsin is essential for the perception of light in the retina, particularly under low-light conditions.
   • This compound is made up of two primary components: a protein called Opsin and a chromophore called Retinal.
2. Incorrect Options:
   • Opsin and Retinol: Retinol is a form of vitamin A, essential for various body functions but not a direct component of the photosensitive pigment.
   • Transducin and Retinene: Transducin is a protein involved in the phototransduction pathway, not a component of rhodopsin. Retinene is an outdated term for retinal.
   • Guanosine and Retinol: Guanosine is a nucleoside, unrelated to rhodopsin formation, while Retinol is not the photosensitive form needed for vision.
3. Correct Answer:
   • The correct set of components that make up the photosensitive compound in the human eye is Opsin and Retinal.
   • This combination forms rhodopsin, enabling the eye to detect light.

In summary, the photosensitive compound rhodopsin is made up of Opsin and Retinal, which is crucial for the perception of light in low-light conditions.