Question

A person deficient in Rhodopsin (visual pigment) should take
A. Tomatoes
B. Radish
C. Carrot
D. Guavas

Answer 1

Rhodopsin is a pigment that is essential for vision, especially in the dim light in a wide range of the organism. The photoreceptors in the retina that incorporate rhodopsin are rods. It contains sensory protein that converts light into an electrical signal.

Complete answer:
● Rhodopsin was discovered by German physiologist Franz Christian in 1876.
● He identified the reddish-purple retina of frog alter into pale colour. This fading of colour occurs because of the damage of rhodopsin via a process is known as bleaching.
● It is a conjugated protein present in the rods cells of our eyes inside the retina.
● Rhodopsin contains 11-cis-retina al which is a kind of vitamin A and the opsin protein.
● Vitamin A activates rhodopsin and sensitizes it to UV rays.
● The Rod cells of our eyes incorporate rhodopsin which is responsible for black and white vision.
● Carrot is a rich source of vitamin A because carrot incorporates carotene from which vitamin-A is produced.
● For the production of Rhodopsin, vitamin A is important.
● Tomatoes are a good source of vitamin C and vitamin K.
● Radish is the source of riboflavin(vitaminB2) and vitamin C
● Guava is the source of vitamin C, fibers, and other antioxidants.
● So, a person who has a deficiency of Rhodopsin should take lots of carrots.
Thus, the correct answer is option C.

Note: Carrots are a rich source of beta carotene, half a cup of raw carrots comprises 459 mcg of vitamin-A while a 3-quarter cup of tomato juice contains about 42 mcg of a vitamin A. Carrot is rich in dietary fiber which can also help to prevent constipation and improves the health of the gut. The deficiency of vitamin A causes Night blindness.