NEET Solved Paper 2017 Question 47
Question: Good vision depends on adequate intake of carotene rich food Select the best option from the following statements
| [a] | Vitamin A derivatives are formed from carotene |
| [b] | The photopigments are embedded in the membrane discs of the inner segment |
| [c] | Retinal is a derivative of vitamin A |
| [d] | Retinal is a light absorbing part of all the visual photo pigments |
Options:
A) [b], [c] & [d]
B) [a] & [b]
C) [a], [c] & [d]
D) [a] & [c]
Show Answer
Answer:
Correct Answer: C
Solution:
- [a] Vitamin A derivatives are formed from carotene: This is correct because carotene (specifically beta-carotene) is a precursor to vitamin A, which is essential for vision.
- [c] Retinal is a derivative of vitamin A: This is correct because retinal is a form of vitamin A that plays a crucial role in the visual cycle.
- [d] Retinal is a light absorbing part of all the visual photo pigments: This is correct because retinal is the molecule that absorbs light and triggers the visual signal in photoreceptor cells.
Statement [b] is incorrect because the photopigments are actually embedded in the membrane discs of the outer segment of photoreceptor cells, not the inner segment.
BETA
