Question

Which one is the correct difference between rod and cone cell?

• A. $\begin{array}{cccc}& & \text{Rod cells}& \text{Cone cells}\\ & \text{Overall function}& \text{Vision in poor light}& \text{Color vision and detailed vision in bright light}\end{array}$
• B. $\begin{array}{cccc}& & \text{Rod cells}& \text{Cone cells}\\ & \text{Distribution}& \text{More concentrated in centre of retina}& \text{Evenly distributed all over retina}\end{array}$
• C. $\begin{array}{cccc}& & \text{Rod cells}& \text{Cone cells}\\ & \text{Visual activity}& \text{High}& \text{Low}\end{array}$
• D. $\begin{array}{cccc}& & \text{Rod cells}& \text{Cone cells}\\ & \text{Visual pigment}& \text{lodopsin}& \text{Rhodopsin}\end{array}$

Answer 1

The correct option is A $\begin{array}{cccc}& & \text{Rod cells}& \text{Cone cells}\\ & \text{Overall function}& \text{Vision in poor light}& \text{Color vision and detailed vision in bright light}\end{array}$

Rod cells - vision in poor light.
cone cells - vision in bright light and colour vision.
Hence option a is correct.

Rods are distributed at periphery of retina and cone cells are in the centre of retina.
Visual activity of rods is low when compared to cones.
Iodopsin is pigment in cones and rhodopsin is pigment in rods.