Vitamin A: Chemistry, Functions and Disorders
Side chains in retinol structure, included:
Hydroxyl group
Carboxylic group
Two isoprenoid units
Dihydroxyl group
Two isoprenoid units
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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
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
ฮฒ-Carotenes are helpful in preventing:
A. Heart attack
B. Neurological disorders
C. Kidney failure
D. Diabetes
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