Question

Which of the following helps us to distinguish colours?

• A. Rods
• B. Rhodopsin
• C. Cones
• D. All of the above

Answer 1

The correct option is C

Cones

The correct option is C

Explanation for the correct option:

1. The retina is the innermost layer of the eye.
2. There are two types of photosensitive cells present in the retina- (a) Rod cells and (b) Cone cells.
3. Cone cells are cone-shaped and contain iodopsin pigment.
4. Cone cells help us to see objects under bright light.
5. They enable us to identify different colours of objects.
6. Problems in cone cells cause colour blindness.

Explanation for the incorrect options:

Option-A

1. There are two types of photosensitive cells present in the retina-(a) rod cells and (b) cone cells.
2. Rod cells are elongated or rod-shaped.
3. Rod cells contain rhodopsin pigment.
4. They help us to see under dim light or at night.
5. They can not identify different colours.
6. Problems in rod cells cause night blindness.

Option-B

1. Rhodopsin is a photosensitive pigment present in the rod cells of the retina.
2. The appearance of rhodopsin is reddish-purple.

Final answer: The cone cells of the retina help us to distinguish different colours.