Q. Which one of the following is the correct difference between rod cells and cone cells of retina? [table] Feature | Rod cell | Cone cell [/table]
A) [table] Visual acuity | High | Low [/table]
B) [table] Visual pigment contained | Iodopsin | Rhodopsin [/table]
C) [table] Overall function | Vision in poor light | Colour vision and detailed vision in bright light [/table]
D) [table] Distribution | More concentrated in centre of retina | Evenly distributed all over retina [/table]
Explanation
Rod and cone cells are the photoreceptor cells of retina. The rods contain the rhodopsin (visual purple) pigment and enable the animals to see in darkness, therefore, present in large number in nocturnal animals. The cones contain the iodopsin (visual violet) pigment and chiefly concerned with distinction in colour and light vision during day time.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.