Vitamin A: Chemistry, Functions and Disorders
Degeneration of ‘germinal’ epithelium is due to vitamin A deficiency, ultimately resulting in:
Germinal layer cancer
Sterility in males
Sterility in females
Sterility in children
Sterility in males
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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
ฮฒ-Carotenes are mainly found in:
A. Animal foods
B. Plant foods
C. Human foods
D. All of above
Side chains in retinol structure, included:
A. Hydroxyl group
B. Carboxylic group
C. Two isoprenoid units
D. Dihydroxyl group
ฮฒ-Carotenes are helpful in preventing:
A. Heart attack
B. Neurological disorders
C. Kidney failure
D. Diabetes
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