Vitamin A: Chemistry, Functions and Disorders
β-Carotenes are mainly found in:
Animal foods
Plant foods
Human foods
All of above
Plant foods
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Vitamin A, acting like a hormone in regulating gene expression, called as:A. Retinol
B. Retinal
C. Retinyl phosphate
D. Phenotype
Molecular weight of ‘Rhodopsin’ is,
A. 25000 molar mass
B. 20000 molar mass
C. 35000 molar mass
D. 32000 molar mass
Iodopsin’ is used for distinguishing the:
A. Red color
B. Green color
C. Brown color
D. Yellow color
Retinal is a structure, having vitamin ‘A’ along with:
A. Alcohol
B. Provitamins
C. Aldehyde
D. Calcium
Degeneration of ‘germinal’ epithelium is due to vitamin A deficiency, ultimately resulting in:
A. Germinal layer cancer
B. Sterility in males
C. Sterility in females
D. Sterility in children
Side chains in retinol structure, included:
A. Hydroxyl group
B. Carboxylic group
C. Two isoprenoid units
D. Dihydroxyl group
β-Carotenes are helpful in preventing:
A. Heart attack
B. Neurological disorders
C. Kidney failure
D. Diabetes
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