Question

The pigment that helps eye to see in dim light is

• A. Iodopsin
• B. Rhodopsin
• C. Haemocyanin
• D. Hematin

Answer 1

Answer: (B)

Rhodopsin

A. Iodopsin is a photopigment of cones that are associated with daylight vision an colour vision of eye.

B. Rhodopsin or visual purple (derivative of vitamin A) is a photopigment in the rods that are associated with scotopic vision of eye i.e. vision under low light or dim light.

C. Haemocyanin is a pigment in invertebrates and transports oxygen in the body.

D. Hematin is a bluish black compound and derived from haemoglobin. It is formed by the oxidation of iron and removal of protein part.

So, the correct answer is 'Rhodopsin'.