Question

Pigment in the cone cells of man responsible for detecting red colour is

• A. Erythrolabe
• B. Chlorolabe
• C. Cyanolabe
• D. Rhodopsin

Answer 1

The correct option is A Erythrolabe

There are two types of photoreceptor cells present in retina of eye, cones (for daylight vision) and rods (for low light vision).

• The cone photopigment iodopsin has three forms:

1. Erythrolabe: It detects red colour.
2. Chlorolabe: It detects green colour.
3. Cyanolabe: It detects blue colour.

• Rhodopsin or visual purple (derivative of vitamin A) is a photopigment in the rods. It is involved in the vision under low light or dim light.

So, the correct answer is 'Erythrolabe'.