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KVPY SX SB Exam 2012 Question Paper
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© examsnet.com
Question : 76
Total: 120
Vitamin A deficiency leads to night-blindness. Which of the following is the reason for the disease?
rod cells are not converted to cone cells
rhodopsin pigment of rod cells is defective
melanin pigment is not synthesized in cone cells
cornea of eye gets dried
Validate
Solution:
Aldehyde form of vitamin A (Retinal) is required for synthesis of rhodopsin pigments of rod cells. deficiency of vitamin A will lead to defective formation of rhodopsin.
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