Question

Which one is correct difference between rod and cone cells?

		Rod cells	Cone cells
(A)	Overall function	Vision in poor light	Colour vision and detailed vision in bright light
(B)	Distribution	More concentrated in centre of retina	Evenly distributed all over retina
(C)	Visual activity	High	Low
(D)	Visual pigment	Iodopsin	Rhodopsin

• A. A
• B. B
• C. C
• D. D

Answer 1

The correct option is A A

Rods and cones are the photoreceptor cells present in retina.

A. Rods are associated with scotopic vision i.e. vision under low light or dim light and cones are associated with daylight vision and colour vision.

B. Rods are distributed throughout the retina and cones are concentrated in the centre of retina.

C. Visual activity of cones is high and low in case of rods.

D. Cones contain three photopigments iodopsin, porpyrosin and cyanopsin while rods contain rhodopsin.

Hence, option A is correct difference between rods and cones.

So, the correct answer is 'A'.